Disston Master Mechanic Wood Boring Spade Bit

Model #: 521176 Master Mechanic, 1-3/8", Spade, Wood Boring Bit, 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. Model #: 521024 13/16 inch power drill wood boring bit, 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. Model #: 521123 Micro-groove point & cutting edges with extended spurs for faster/cleaner boring action. Heat treated for extra strength. Forged in one piece from special grade tool steel. Woodboring Micro-groove point Model #: 521416 Master Mechanic, 11/16" Power Drill Wood Boring Bit, 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.