Universal Knurl Hidden Gem Long Red Shift Knob (SK-810RD) by NRG Innovations®. The Hidden Gem shift knob is designed to give you the absolute BEST grip possible, while offering some utility to go along with that. Featuring a knurled 6061 aircraft grade aluminum body, and removable screw-on cap, you'll be able to stash extra cash, documents, or even add weights inside and make your own heavyweight shift knob (weights not included).