I thought I'd share how you can make your own Kusari-Gama.
Step 1. Tools and Supplies:
Hobby Knife
Small Saw
Super Glue
Sand Paper/File
Sheet Styrene (1mm thick)
3/32" Tube
Chain or Blackened Chain (approx. 20 links per inch)
Jackstay Eyebolts (.75mm or 1.5mm)
Step 2. Cut
Now cut two pieces of the tubing using a small saw. One will be for the handle (1") and the other will be for the weighted end (3/16"). Using the saw will allow you to avoid any crushing of the tube when you cut it. Sand the ends of both tubes. Cut a piece of the sheet styrene for the blade (5/8" X 3/16") with a hobby knife. Cut the chain with wire snips or a hobby knife (6").
Step 3. Shape
Take the piece of sheet styrene you cut and shape the blade. Round the corner from the top long side to the bottom short side with a hobby knife and sand it with a file or sand paper. Then sharpen the top and rounded side to simulate the edge of the blade.