The MILWAUKEE(R) #6 Countersink features a 9/64" Drill Bit. The pre-drill and countersink bits are designed for use in Milwaukee Drill Drivers. The 1/4" Quick Change Hex Shanks allow for quick size changes. The 1/8" Hex drill bit length is adjustable to allow for precise depth control. | Milwaukee Tool 9/64" #6 Countersink Drill Bit