7/16-inch Hex Impact Shank Reduces Slipping In Standard Chucks
Adds 12 Inches To Speedbor Max Self-feed Wood Drilling Bits.
Drill Bits Have 3 Cutting Edges That Are Hardened For Durability And Long Life In Tough Materials
Precision-milled Shank Eliminates Run-out And Wobble.
Drill Bits Feature Replaceable Screw-point Tips That Pull The Drill Bit Fast For Clean, True Holes
Drill Bit Has An Aggressive Screw Pitch
Irwin Drill Bit Extension Is Compatible With Most 7/16-inch Impact Drills
Forged In One Piece From High Carbon Steel For Maximum Strength Under Tough Drilling Conditions.
