MAX Keyed spline drive racing nuts are made from steel, CNC machined. CLEARCOAT STAINLESS finish. 12x1.25 (Nissan & FRS-BRZ thread) Now you can have the form and function of the racing nuts your car deserves without allowing anyone with a socket wrench to jack your wheels. Sold in a set of 20 & one key is included. Ends are threaded to accept colored caps which may interfere with extra long studs.