Irwin® 1882793 Wood Countersink Set, 4-Piece Rainy_Weather The minimum length needed to

The minimum length needed to guarantee airflow through the insulation

The patent pending tooth design delivers up to 2X the life versus the previous model making cutting heavy metal faster and easier

Installs quickly and easily

Locking handle for compact storage

16 gauge stainless steel base and slotted hex-head bolts

Irwin® 1882793 Wood Countersink Set, 4-Piece Rainy_Weather The minimum length needed toIrwin Wood Countersink Set features adjustable four cutter counterbore cuts and clears chips quicker for fast, smooth countersinking. Counterbore attaches to flats on shank with two hex screws for a secure fit, and can be adjusted for controlled pilot hole depth. Tapered drill with widened flutes for drilling fast, clean pilot holes. 1 4" quick change shank reduces slipping in standard chucks and is compatible with all 1 4" quick change chucks,