For removing and installing harmonic balancers that have threaded holes. For removing balancers, kit contains 2/3 combo yoke, 5/8-in x 5/8-in national fine center screw, center point piece, and the following bolt pairs: 3/8-in-16x4-in national coarse, 3/8-in-24x2-in national fine, 5/16-in-18x2-in national coarse, M8-1.25x80mm and M10-1.5x50mm. For installing balancers, kit contains 7/8-inx4-1/4-in national fine center screw, thrust bearing, forcing nut, jaw nut and the following adapters: M12-1.5, M14-1.5, M16-2.0, 7/16-in- 20, 1/2-in-20, 9/16-in-18, 3/4-in-16. Storage case complete with laminated instruction sheets with photos. Meets or exceeds ANSI standards. Lifetime warranty.