Milwaukee® 1/4" Router Collet is designed for 5610, 5620, 5650, 5670, 5680, 5681 and 5682 routers, 5660 1 1/2" H.P router, 5626-68 motor unit, 5619-20/5619-29 1 3/4" H.P. D-handle routers, 5615-20/5615-29 1 3/4" H.P body grip routers and 5616-20/5616-29 2.25 max. H.P. body grip router with electronics. Router collet is used for securing 1/4" shank router bits for precision routing.