Genuine Makita 763618-5 8mm Collet Cone for the RT001G cordless trimmer and 3620 router. Designed to securely hold compatible 8mm shank router bits, this replacement collet cone is ideal for replacing a worn, damaged or missing original or for configuring a compatible router for 8mm tooling. Makita identifies 763618-5 as Collet Cone 8mm.