[Ben Piecuch]

I will warn you that the VEX Square shafts are actually rounded on the corners. This is to allow the shaft to fit into the plastic molded clutch packs.

For a very light duty application, and I mean extremely light, that "keystock" will work. However, for a drivetrain, arm, elbow, wrist, etc... I would NOT recommend the VEX square shaft.

As mentioned above, Home Depot should have 1/8" square stock. Otherwise, you can order from McMaster, Grainger, etc...

Good luck,

BEN