IRWIN Irwin 3/16 in. Dia. High Speed Steel Countersink 1/4 in. Quick-Change Hex

Countersink Tooling: This product functions as a #10 countersink tool, designed for specific drilling applications.
Efficient Counterbore: Features an adjustable 4-cutter counterbore that enhances cutting and chip clearance, facilitating fast and smooth countersink or counterbore drilling.
Pilot Drilling: Equipped with a tapered drill and widened flutes, enabling the creation of fast and clean pilot holes.
Secure Attachment: The counterbore attaches to a flat on the shank for a more secure fit, and it can be adjusted using two hex screws.
Depth Control: An adjustable stop collar can be attached to the counterbore, allowing for precise control over the countersink depth.
Quick-Change Shank: Incorporates a 1/4 inch Quick Change Hex Shank, which minimizes slipping in standard chucks and ensures compatibility with impact drivers.