Sharpen your hand building skills for the Knives and Blades Challenge! Together with eMachineShop, we're calling on you to craft homemade knives and blades.

Two winners will receive a $500 credit from eMachineShop and runners-up will take home an Instructables prize pack including a stainless steel mug or robot T-shirt. We can't wait to see what you make!

The Knives and Blades Challenge is closed.

Grand Prize

27 Prizes

Grand Prize (2)

Two Grand Prize winners will receive:
  • $500 eMachineShop Credit
  • an Instructables prize pack including a robot t-shirt or stainless steel mug

Runner Up (25)

Twenty five runner up prize winners will receive:
  • an Instructables prize pack including a robot t-shirt or stainless steel mug
How It Works

Write an Instructable

Create a new Instructable that fits the guidelines outlined in the contest description above. To be eligible, Instructables must be published between Dec 19, 2016 and Jan 16, 2017 (11:59pm PT).


Upon publishing your Instructable you'll see checkboxes for open contests. Select Knives and Blades Challenge. If you have entries currently eligible for entry, it will also show up by clicking "Enter this Contest" on the right side of this page.


Entries are accepted by Instructables staff within one business day Monday - Friday. What matters is the submission time, not acceptance time.


A panel of judges made up of Instructables staff and respected members of the community rate the finalists. The averages of the ratings determine the winners.


When the winners are decided they will be notified and announced here on the contest page.