12-Bolt Floating Hat Wide Bobbin Disc Attachment Hardware Kit12 Bolt Disc Attachment Hardware kit for AP Racing floating hat 390mm (wide bobbin) two piece discs One kit= enough hardware for one disc (buy two kits if you are swapping iron rings on two discs). Includes bolts, nuts, and washers (Bobbins and AKB spring clips are re used assuming no visible wear) Torque specs for disc assembly using this hardware= 10 foot lbs. 124 inch lbs. Used with discs: CP7177 (390mm only)