Superior Electric 2 piece Router Collet Kit 1/4" and 1/2" Replaces Dewalt 326286-04, 326286-03, Bosch 2610906283, 2610906284, Hitachi 323-293, 323-421 Kit Includes: (1) 1/4" Router Collet Replaces Dewalt 326286-04, Bosch 2610906283 & Hitachi 323-293 - RC025DW (1)1/2" Router Collet Replaces Dewalt 326286-03, Bosch 2610906284, Hitachi 323-421 - RC050DW