Replacement Parts Set – 1 Set of 4 Pieces, Identical to the Image. It fits to Makita 3621 Router,3621A Router,3620 Router,RP0900K 1-1/4 HP Plunge Router,RT0700CX3 1-1/4 HP Compact Router Kit,RT0700C 1-1/4 HP Compact Router,RT0701C 1-1/4 HP Compact Router,RT0701CX3 Misc,RT0701CX7 Misc,XTR01T7 Misc,XTR01T8J Misc,XTR01Z Misc. Main Functions:Router collet provide precise tool clamping to ensure the stability of the tool during high-speed rotation and cutting processes Easy Installation:763637-1 Collet is easy to install and directly replacement of damaged router parts durable:The router components are made of wear-resistant materials, which are wear-resistant and durable