Description: Small tip includes clearance hole for screw shank. Large diameter creates flat-bottomed hole. Recommended for use with corded high-rpm drills. Specification: Type: Step Drill Bit Material: HSS Color: Silver Features: Recommended for use with corded high-rpm drills Diameter: 9.5mm Total length: 6.29"" (160mm) Package: 1 x Hex Twist Step Drill Bit 1 x Stop Collar 1 x Wrench Type Step Drill Bit Features Recommended for use with corded high-rpm drills MPN Does Not Apply Color Silver Material HSS Total length 6.29" (160mm) Diameter Size 9.5mm Brand qixia EAN 0701160663561 .