Designed with spiral fluted step tip drill bits, the Astro Tools TS21 ONYX 21pc TurboStep HSS Mechanics Length 1/16" - 3/8" Drill Bit Set simply outperforms every conventional drill bit design in nearly all materials. These drills eliminate bit walk and the need for pilot holes with three-flat shanks and mechanic’s length for superior access in cramped spaces. Making these drill bits excels on hard alloys, sheet metal, and imperfect parts that are difficult to start drilling into. 

• Spiral fluted stepped tip drill bits that simply outperform every conventional drill bit design in nearly all materials
• Eliminates bit walk and the need for pilot holes
• Excels on hard alloys, sheet metal, and imperfect parts that are difficult to start drilling into
• Precision ground from heat treated quality M2 High Speed Steel and Onyx oxide coated to prevent chip build-up
• Three-flat shanks and mechanic’s length for superior access in cramped spaces