The Claw.

Step 8 Add the jaws

Drill a small hole horizontally into the hole nearest the centre. Also, file into each side of the other hole, so the spring will fit around. Then, feed the end of a piece of wire into the hole, and draw it out the side. Tie a knot in the end, and push it back into the hole. Then, bolt each jaw between the jaw mounts with a bolt and nylock.