The Q-Lock Adapter with Hexagon Socket enables operating hole saws for tools equipped with mandrels. It provides the necessary connection between hole saws and power tools when cutting. The Q-Lock adapter is a keyless system that is unique in the market for standard hole saws. The adapter is compatible with corded and cordless drill drivers. Hex adapter for 1/2" and 5/8" thread with HSS-G pilot drill bit (1/4" fitting) Width across flats 9.5 mm, for diameter 14 mm, 9/16" - diameter 210 mm, 8 9/32" (in metal up to 152 mm diameter) • For Operating Hole Saws on Tools Equipped With Mandrels • Q-Lock Adapter with Hexagon Socket enables operating hole saws for tools equipped with mandrels. • Provides connection between hole saw and power tool when cutting. • Compatible with corded and cordless drill drivers.