This harmonic balancer kit includes a range of components essential for various applications. It contains 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. With this assortment, you have the right pieces for different jobs.