Wildcats Boost Gear Shift Knobs have a modern sleek style and is made from high quality alloy that perfectly fits most vehicles but is specifically designed to fit cars and trucks with a manual 4, 5 or 6 speed transmission or a buttonless automatic transmission shift knob. Installing a gear knob has never been easier with no modifications, drilling or cutting needed. Simply remove the old shift knob, select the correct thread adapter (provided) and screw your new shifter onto the gear shaft.