Master Mechanic, 8 Piece, Spade Bit Set, With Storage Case, Cutting Spurs Cut Smooth & Fast While Eliminating Wood Splintering, Includes: 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4" & 1-1/2" & 1/4" Hex Shank For Quick Change Adaptors, Micro-Groove Point & Cutting Edges With Extended Spurs For Faster, Cleaner Boring Action, Heat Treated For Extra Strength, Forged In 1 Piece From Special Grade Tool Steel, Clamshell.