The PERRIN shift knob features a heavy weight, solid steel body that is up to two times the weight of the OEM knob. Heavy weight knobs are great for smoother shifts, especially with aftermarket short shifters.Each PERRIN Shift Knob is precision machined and is finished in raw brushed stainless steel. With this finish being extremely durable, your shift knob will be ready for years of shifting.The PERRIN Shift Knobs height can be adjusted by as much as 1 inch with the built-in adjustment screw. Once the height is set, tighten the lock bolt and your knob will never loosen on its own. Best of all, the super locking mechanism will not harm the threads of your shifter!Multi-piece design for easy and accurate installation as well as great looks. The main body is precision machined from heavyweight stainless steel. The lower piece is machined from billet aluminum and designed to fit precisely around the reverse lockout lever.