Milwaukee 49-56-7103 Angle Grinder Adapter (Small). The Milwaukee Angle Grinder Adapter is an adapter designed for use with the Diamond Plus Hole Saw. The Adapter Fits standard 5/8"-11 spindle threads. The Milwaukee Angle Grinder Adapter (Small) will fit sizes 3/16" to 1-1/8"r Diamond Plus Threaded Hole Saws. When the correct adapter and saws are used, a cutting life up to 10X's longer can be achieved.