3/16" X 4-1/4" Countersink Drill Bit 1882782-SBD

Irwin’s Drill Bit is a 3/16 in diameter, 4-1/4 in long countersink bit designed for fast, clean pilot hole drilling in wood. Its tapered drill with widened flutes ensures efficient chip removal and smooth cutting, while the adjustable four-cutter counterbore delivers quick, precise countersinking for professional-quality results. The counterbore and adjustable stop collar both secure firmly to the shank with dual hex screws, allowing controlled pilot hole and counterbore depths. Built with a durable HSS cutting edge and featuring a 1/4 in quick-change shank, this bit reduces slipping in standard chucks and is fully compatible with all 1/4 in quick-change systems, including impact drivers—making it an ideal choice for woodworking, cabinetry, and general construction.
Key Features
- Tapered drill with widened flutes for fast, clean pilot hole drilling in wood
- Adjustable four-cutter counterbore cuts smoothly and clears chips quickly for precise countersinking
- Counterbore secures to shank flats with two hex screws and adjusts easily for controlled pilot hole depth
- Adjustable stop collar attaches to the counterbore with two hex screws and allows setting exact counterbore depth
- 1/4 in quick-change shank reduces slipping in standard chucks and works with all 1/4 in quick-change systems, including impact drills
- Durable HSS construction ensures long-lasting performance in woodworking, cabinetry, and general construction