Blue-Groove point and cutting edge for faster chip removal; double cutting spurs scribe the outside of the hole reducing breakout. Grooved hex shank prevents slipping in drill chuck or bit extension, fits all standard quick change chucks. Includes (1) one each: 3/8", 1/2", 5/8", 3/4", 1", 1-1/8", 1-1/2" and case.