Irwin 1882630 Wood Countersink Drill Bit, #4 x 7/64" Knee Pads This rubberized coating forms a

This rubberized coating forms a chemical bond to the roof surface which provides incredible adhesion and long term waterproofing protection

5/8" flare x 1/2" flare

SAE J560B and ISO 1185

Designed for maximum wear under water

Coarse Thread - Sharp Point

Irwin 1882630 Wood Countersink Drill Bit, #4 x 7/64" Knee Pads This rubberized coating forms a1 4" quick change shank reduces slipping in standard chucks and is compatible with all 1 4" quick change chucks, including impact drills. Counter bore attaches to flats on shank with two hex screws for a secure fit and can be adjusted for controlled pilot hole depth. Highlights: Bit # : 4 Tapered drill with widened flutes for drilling fast, clean pilot holes Adjustable four cutter counterbore cuts and clears chips quicker for fast, smooth