Irwin Industrial Tool Co 1882784 No. 12 Wood Countersink Bit

Product Description

The IRWIN INDUSTRIAL TOOL CO 1882784 is a No. 12 wood countersink with a tapered drill design built for fast, clean pilot holes in woodworking applications. Widened flutes clear chips efficiently, while the 4-cutter adjustable counterbore delivers smooth countersinking in a single pass. The counterbore attaches securely to the flats on the shank using hex screws, allowing controlled adjustment of pilot hole depth. The 1/4 inch quick-change shank reduces slipping in standard chucks and is compatible with all 1/4 inch quick-change chuck systems, including impact drills. This tool is sold in a package of 6 units.

Designed for fine woodworking projects, the 1882784 handles pilot hole drilling and countersinking in one operation, reducing the need to swap bits mid-task. The adjustable counterbore makes it practical for repetitive production work or custom joinery where consistent hole depth is critical. The quick-change shank makes bit swaps fast on job sites or in shop environments where multiple countersink sizes are in rotation. Woodworkers, finish carpenters, and cabinet installers are the primary users of this tool.

Key Features

• Widened flutes clear chips quickly for fast, smooth countersinking
• 4-cutter adjustable counterbore for controlled pilot hole depth
• Counterbore locks securely to shank flats with hex screws
• 1/4 inch quick-change shank compatible with standard and impact drill chucks
• Bit diameter of 7/32 inch with 7/16 inch counterbore and 7/16 inch plug size
• Sold in a package of 6 units

Compatibility

Compatible with all 1/4 inch quick-change chuck systems, including impact drills. Designed for use in fine woodworking projects requiring tapered pilot holes and countersinking in wood substrates.

Installation Notes

This bit is installed and removed using a standard 1/4 inch quick-change chuck — no tools required for bit changes. Adjust and lock the counterbore depth before beginning a run of holes, and verify the hex screw is fully seated against the shank flats before use. Disconnect the drill from power before making any depth adjustments to the counterbore. Follow standard workshop safety practices when operating rotary cutting tools.