So i watched my sister and mom make a no sew tie blanket. what a pain in the @ss! you have to keep measuring and pinning needles and it took them hours to make blankets. so i came up with this jig, that is cheap and folds for storage.

STUFF YOU WILL NEED-

2 sheets of 1/4" masonite
a piece of sheet rubber
contact cement
aluminum tape or duct tape

TOOLS YOU NEED-

drill
speed square
1/2" drill bit - i used a mortise bit
tape measure
colored pencil with bright lead
scrap 1x wood to make a saw jig
chalk line or long straight edge

Step 1: Getting Started

cut the masonite in to 2 pieces 30x50 and 1 piece 12x60
when you put them together it will be 60x50
use the tape measure and mark 4" on each corner and snap a line to connect them.
then after that mark 1" then 1/2" then 1" then 1/2" untill you reach the other end. do all 4 sides.
take the speed square and mark lines.
take the 1/2" bit and drill a hole at the end of every 1/2" mark like in the photos.

Step 2: Cutting the Groves

take the scrape 1x and make a jig that slides down the masonite but extends out to keep the back of the saw straight.
go around the masonite and cut all the lines to connect to the holes that were drilled.
take the 12" piece and mark, drill, and cut the same way.
find center of the 12" piece and make a handle.
cut the rubber to go about 12' on each side.
glue the masonite and the rubber wait till all most dry then stick together and tape the edges.