"U" x 12" HSS Aircraft Extension Drill Bit 6" Cobalt Aircraft Fractional Drills They feature a left-hand helix

They feature a left-hand helix and are made of high-speed steel with a 118° conventional point

Their high red hardness allows for speeds up to 30% greater than conventional M2 high-speed steel and the 135° split point tip ensures fast and precise drilling

and bronze

These COHEX Series m35 5% cobalt drill bits are specifically designed for use in hand-held and impact drills

and other thin materials

"U" x 12" HSS Aircraft Extension Drill Bit 6" Cobalt Aircraft Fractional Drills They feature a left-hand helixDescription A versatile drill for production, maintenance, or portable drilling jobs. Ideal for extended reach. 135 split point tip for fast, accurate drilling. Works on many materials. Black oxide surface resists abrasion and improves chip flow. The round shank fits various tool holding systems. Sold in packs of 6