Package include :1 Collet Locking Nut Assembly Part Number ：48-66-0974 48-66-2485  It is 14-46-0166 1/4” (6.35mm)collet. For Milwaukeee 48-66-2485 48-66-2486 Collet & Nut Assembly 2485-20 2486-20. For Milwaukeee Collet Nut 48-68-0031,the replacement part number is 14-46-0166 48-66-0975 48-66-0974.  For Milwaukeee 2485-20 (K92A) M12 Fuel 1/4 Inch Ra Die Grinder Bt 1 4, 5195 (SER 525-10500) Grinder, 5195 (SER 525-16000) Grinder. for Milwaukeee 5196 (SER 675D) Grinder, 5196-2 (SER 675B) Grinder,5196-2 (SER 675-1001) Grinder, 5196-2 (SER 675A) Grinder, Compatibility: for Milwaukeee 5192 (SER 669-1001) D.I. Grinder,5192 (SER 669-12000) D.I. Grinder, 5192 (SER 669-33651) Grinder, 5192 (SER 669-8001) D.I. Grinder, 5192 (SER 669A) Grinder, 5192 (SER 669B) Grinder, 5192 (SER 669C) Grinder, 5192 (SER 669D) Grinder, 5192 (SER 699-33651) D.I. Grinder, 5192-2 (SER 669C) Grinder, 5192-7 (SER 669-1001) Grinder. 5192-2 (SER 669-1001) Grinder, 5192-2 (SER 669A) Grinder, 5192-2 (SER 669B) Grinder  Stable drill bit clamping and high-precision clamping effectively prevent slipping or loosening, minimize vibration, improve processing accuracy and drill bit service life, and ensure operation stability and consistency.  Please confirm that the model you need to buy matches model before ordering.