1/2 Cobalt Steel HD Gold Finish Jobber Length Drill Bit (6 per package)Jobber Length Straight Shank M42 High Speed Steel Suitable for Stainless Steel Hardening Grade of Stainless Steel High Temperature Alloys Heat Treated Materials Abrasive Plastics Specifications Drill Size 1 2 _in Decimal Equivalent 0. 5000 _in O A Length 6 _in Flute Length 4 1 2 _in Point 135 _ Split Point larger image Finish Gold Shank Type Straight Material M42 High Speed Steel Suitable For Abrasive Plastics _ Hardening Grade of Stainless Steel _