Description of ๐ง IRWIN Tools Black Oxide, Model 4935643
These drill bits use a 135ยฐ split-point tip to start drilling quickly and minimize walking. Each drill bit is made with high-speed steel with a black oxide treatment to resist corroding. 1/4-inch hex shank works in most Lock-n-Load quick-change extensions as well as most drill chucks. Suitable applications include automotive, maintenance and repair, portable drills and stationary drill presses. 12-piece set includes 1/16", 5/64", 3/32", 7/64", 1/8" (2), 9/64", 5/32", 3/16", 7/32" and 1/4" drill bits and a Lock-n-Load quick-change extension. These drill bits use a 135ยฐ split-point tip to start drilling quickly and minimize walking. Each drill bit is made with high-speed steel with a black oxide treatment to resist corroding. 1/4-inch hex shank works in most Lock-n-Load quick-change extensions as well as most drill chucks. Suitable applications include automotive, maintenance and repair, portable drills and stationary drill presses. 12-piece set includes 1/16", 5/64", 3/32", 7/64", 1/8" (2), 9/64", 5/32", 3/16", 7/32" and 1/4" drill bits and a Lock-n-Load quick-change extension.