Introduction: D.I.Y. Neck Knives.... you have some spare time and a dull circular saw blade layin' in the floor of your "shop"....

Here's how to fashion a quality neck knife, better than any Chinese-made garbage you get at the hunting store...with stronger materials, and cheaper, to-boot.....

Remember this: MOST neck knives on the market are made from low-quality, Chinese steel, are half or less tang, and cost between $19 and $50....
Quality saw blades are high-carbon steel, tempered to resist breakage and wear, and cost nothing to save from the garbage

Hope you enjoy the 'ible, and please check out my website!

Step 1: Tools & Materials....

For this project, you'll need a few basics....

*angle grinder with cutoff wheel or metal band saw, etc...
*bench grinder...
*drill and steel-cutting bit...
*disc or belt sander...
*sharpening stone or implement...
*tool wax...
*550 paracord...
*scrap kydex or plastic sheet (old plastic Nintendo sleeves work well, also)...
*plastic tool hande dip...
*carbon- tempered circular-saw blade (no cheap stamped steel garbage)...

Step 2: Designing Your Blank...

When choosing a design....go for form and function...the coolest looking knives are often crap in the real world.... For a symmetrical design, use a piece of paper -folded in two- for your template....draw a 1/2 profile of your desired blade blank, and cut it out. When it's unfolded, you'll get a truly symmetrical template.

Once it's satisfactory, choose a good spot on your saw blade, and super-glue it to the surface...

I also draw around the template with permanent marker, so if the paper comes off, I'm not without a map....

Step 3: Roughing It...

Grab your gloves, glasses, ear plugs, dust mask, and angle grinder with cutoff wheel and get to can be pretty rough at this phase, just remove as much material as possible, "feathering" the rough edge, so that the final pass with the bench grinder will be easier on the metal, your hands, and the grinder....

Just remember: The inside of that little black line is your "limit-ine"....go past that, and you're no longer within the parameters of your perfectly symmetrical blank....

Step 4: Cleaning Up the Blank....

Now take your blank to the bench grinder and clean it up until it follows your profile marks...

Keep a pot of water handy, to quench frequently....or you'll disrupt the temper of the blade steel by getting it too rule of thumb is: If you can't handle it with bare fingers, it's already way past too hot...

Then drill two holes in the center of the profile, both at the front and rear of the handle...I used a 3/16" steel bit, then smoothed the holes with a Dremmel and tapered stone, so they won't fray the paracord wrap.

Once the shape is right, and the holes are drilled and smoothed, let it rest lightly on both sides against a belt sander or disc sander with some 180-200 grit, to deburr and remove tool scratches...

Now's also a good time to pre-form your blade edge, though I would wait for sharpening until the last step, for safety.

Step 5: Handle Wrap...

Before wrapping your handle, I'd recommend giving the blank a good oil bath and a rub-down with some tool wax, to guard against corrosion, especially from sweat, when worn...

Then, grab about 5 feet of 550 paracord and feed it through the front hole. From there, cobra wrap toward the rear hole, pass your strands through, in opposite directions, of course, tie a square knot, and clip and burn the ends about 6' or so from the knot.....

Step 6: The Sheath and Neck Lanyard...

Grab up whatever plastic derivative you've scrounged, and fashion your sheath for a tight fit.....

I follow the shape of the blade with a pattern of holes, then stitch it together with paracord gut strands....then I dip the whole thing in plastic tool coat and wait overnight. Then I install a neck lanyard to fit.

I also insert and epoxy a cut-to-fit piece of business card magnet-backing, for blade retention when suspended from the neck...

Last order is to grab the stone and a piece of 1500 grit paper and put an edge on it that'll mow hair!

Step 7: Rinse and Repeat...

You should be able to get at least 3-4 blades of this size from one saw blade, when laid out properly...

Mix it up and build your own blade...this one will last a looong time...

If you're planning on making more than one of a design...perfect a blank, mark it as such, and use it over and over again to jig nice clones...

Thanks for checking out my fourth "instructible", and don't forget to come visit my site at .


ZaneEricB made it!(author)2014-09-09

Very Very Very nice!.... I'm gonna take a swing at this...maybe this weekend! Thanks!!

grawson made it!(author)2014-05-21

Turned out great. Made my own design and ran with it. Needs a sheath!

HTWTUSA made it!(author)2009-04-04

I figured it would be kind of silly to post another "instructible" for a knife made with the same process, but thought you guys might like a looksie at my latest design, anyway, just goes to illustrate one of the many adaptations which can be made with this simple platform and process....

CementTruck made it!(author)2012-06-04

My next dull saw blade will be reincarnated as a "Karambit"

deadpooltacos made it!(author)2014-05-11

karambits are pretty awesome knives, you definitely need to make one.

HTWTUSA made it!(author)2012-06-04

Definitely a great application of this process...I would love to see the finished project.

triumphman made it!(author)2012-04-29

The "Blade" movie ?

harmsc12 made it!(author)2012-03-30

Looks like something a Klingon would use.

triumphman made it!(author)2012-02-10

Riddick wants one of these! "It's a personal grooming device"

imakeknives made it!(author)2010-02-17

SWEET! that looks str8 out of a Riddick movie!

abadfart made it!(author)2010-03-19

i was about to say the same thing  

crayzclown1 made it!(author)2009-09-15

EPIC! It reminds me of a spyderco...

rocksalt2342 made it!(author)2009-08-12

...have you read 'the dirt eaters', by any chance?

HTWTUSA made it!(author)2009-08-17


rocksalt2342 made it!(author)2009-08-17

well, you should. It describes a sword just like that, except a bit longer.

HTWTUSA made it!(author)2009-08-19

i'll haffta check it out...

SkateboardingForLife made it!(author)2009-06-19

wow thats awesome

hoghuntingdude384005582 made it!(author)2012-05-28

if florida you can carry a machete if you wanted to as long as you aint misusin it.

triumphman made it!(author)2012-04-29

Thats not a knife that, a knife store!

triumphman made it!(author)2012-04-11

FYI , every state has its own legal knife length. Last I heard NY is four fingers across to be legal any longer and the man can take it and you if he wants, to the slammer! Also depends on the situation at hand and if the "officer" has had his donuts and coffe! Met some good cops and some bad, all kinds out there. They all have good and bad days too, just like real people do! If the female in his life is bitchin all the time he will most likely be looking to take it out on you! If she is nice and cuddly he will be more tolerant! So good luck !

author made it!(author)2012-02-17

can U please upload the figure you used? I really like it!

ThaAWESOMEducttapeguy made it!(author)2012-01-28

how do you do an 'oil bath?' love the 'ible by the way!

neverwinter829 made it!(author)2012-01-21

First, this was a great instruction on how to make a neck knife. Second, I hate to be a know it all, but I wanted to clear up the blade length legality issue. Some states do have their own double edge or serrated edge issues. Many states have length restrictions from 3" in restrictive states up to less restrictive like Montana. In states like Montana you can carry a sword as long as it is sheathed but not concealed (the law as of a decade ago when I checked back then). Most important to all of this is that if the knife is concealed and law enforcement wants to make a stink about it, a concealed knife is an illegal knife almost everywhere, and the exceptions are thin. Don't get in trouble and avoid giving law enforcement a reason to frisk you and find your set of throwing knives hiding but ready for use. Don't make it look like your knife is intended as a threat to someone else and you won't have to worry about the other length/serrated issues. I know this may have been an old thread, but I liked HTWTUSA's well instructed and legitimate project, better not to leave questions about legality at the conclusion. Hope this helps.

Pat_Maroney made it!(author)2010-08-28

I've heard old leaf springs from cars is great steel to use for homemade knives. Anyone have experience making any with them?

Master+Beorn made it!(author)2011-12-08

I have... but it is a LOT of work. If you are gonna put in the work for spring steel... make a sword. It takes just as long as a knife. Really.

woodreaux made it!(author)2010-09-06

Leaf springs DO make great knives...but they are wayyyyy too hard to use unless you can do some involved blacksmithing with a forge, annealing the metal and then drawing the metal back to a tempered hardness. Stock removal is not recommended either, the metal is too hard and will eat grinding wheels up. Stick with the saw blades or reshape old high quality butcher type knives.

qwerty2008 made it!(author)2011-09-09

I took a stainless steel meat cleaver and made a bowie knife.

panzerfaust379 made it!(author)2011-05-20

I've made several, you need to remove the temper first to work the steel,Then re temper & last sharpen. better read up on it first.

bobthebuilder728 made it!(author)2011-10-03

Check out my circular saw blade knives. The older circular saw blades are so much better because of the quality of the steel. Great Knife!

ShoneDemonscales made it!(author)2011-07-30

Ok, in Texas and most other states, the legal length for a knife is 5" it cannot be double bladed and yes a serrated blade still counts as blade. The mans palm this is some BS that people try to use as a benchmark. cops will whip out a tape measure, keep it below 5 and only one side of it can have an edge. :) happy hunting

qwerty2008 made it!(author)2011-09-09

California allows any size fixed blade knife and up to 6" concealed knives

HTWTUSA made it!(author)2011-08-06

What he said...and remember: that's specifically for your EDC blade...I have an Arkansas Toothpick and several Kabars which exceed these length limits, but they are reserved specifically for outdoor activities and S&P...

Carrying anything bigger than five inches around with you every day is asking for one of two things: Trouble, or discomfort...xD

sonofstone made it!(author)2011-05-05

i gotta try this, though it may not be legal here

spencedaddy made it!(author)2011-06-15

im not sure but normaly knives are legal as long as they arent over 3"

sonofstone made it!(author)2011-06-16

fixed blades are legal i think, and the rule here says, if the blade is longer than a mans handpalm, its illegal

tylerzee made it!(author)2011-06-17

false lol

TonyODonnell01 made it!(author)2011-04-29

The carbide tips off a saw blade make great arrow tips. You just have to make sure it does not hit a rock or anything like that.

jsawyer made it!(author)2011-01-29

I was wondering how to keep the knife secure in the sheath. The business card magnet is a great idea!

I'm going to look through my old saw blades! Thanks!

looker1995 made it!(author)2010-08-01

For those of you looing for blade material other than saw blades, check your local Goodwill, Salvaton Army, garage sale, etc., for old carbon steel butcher knives. The steel is usually good, and the blades are big enough to remake into other shapes. Don't forget to remove the handle to give yourself more material to work with.

ruffin35 made it!(author)2009-03-24

holy crap i want one of thos "pocket" knifes lol

Hunter+O. made it!(author)2010-05-24

Yeah I was reading about the Swiss Army Knife and they make a 9-inch one for $1200 and I think it has something like 85 attachments. This is the first picture I've ever seen of it

Robot+Lover made it!(author)2010-07-22

it Actually has around 148 applications. :D

Hunter+O. made it!(author)2010-07-23

Wow I was way off. But I'm pretty sure its nine inches and $1200

Robot+Lover made it!(author)2010-07-23

yeah. where i saw it, it was 1000$ but maybe in canada it's 1200$ :D

Motts made it!(author)2010-06-10

I think they're available at Really expensive though.

zipzapper859 made it!(author)2010-02-01

its more of a backpack knife or a pants leg knife

crayzclown1 made it!(author)2010-02-03

 Make a pocket/belt clip. THAT WOULD BE SO KILLER!!!

zipzapper859 made it!(author)2010-02-04

yo dude can i use that pic as the pic for my account?

crayzclown1 made it!(author)2010-03-03

 Yeah, sure.

Atlas22 made it!(author)2009-11-27

you know how sometimes you take out your pocket knife and it falls near your toe and you say"whoa, that was a close one." Well, imagen it with this one, and it hits...and your barefoot...

About This Instructable




Bio: Carpenter, handyman, husband, dad, buddy...
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