In the following video, I demonstrate how to build a simple device to increase the inertia of the wearers fist, allowing the easy destruction of concrete blocks.
For this project, you'll need the following parts:
- 10" strap hinge
- 1' x 3" foam core PVC
- 4" x 1/2" PVC
- One 5 1/2" x 1/2" bolt and nut to fit
- Two 1" x 3/8" round head Allen screws and lock nuts to fit
- Four 1/2" washers
- One 4" x 3/8" bolt
- One 2" x 3/8" bolt and nut to fit
And the following tools:
- Handsaw
- Drill and bits
- Box-end wrenches
- Allen wrenches
- Sandpaper or bench grinder
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