Type:Harmonic Balancer Puller. Designed to allow for easy and simple removal of harmonic balancers, gear pulleys, steering wheels, and crank shaft pulleys. Material: Carbon Steel. The kit includes the 1 center screw, 1 Floating swivel, 2 5/16 x 4 bolts, 2 1/4 x 3 bolts, 3 1/4 x 2 bolts, and 3 5/16 x 2 bolts, all bits are machine precision, hardened, and tempered.