OEP Clamping Knobs can be made with literally thousands of insert sizes/configurations. Many types of plastics available, from cost effective and versatile standards, to engineered brand names. Custom color matching is simple, and metal insert materials include: grade 5 or grade 8 steel, 302/303/316 stainless steel, brass, aluminum.  We offer many plating options and other secondary operations such as hole drilling, slotting, nylon patching, nylon pellets, and much more.