#1 Cobalt S&D 1/2 Reduced Shank Drill Bit, Heavy Duty Gold Finish 12 PCS135 Degree Point 6" Length Round 1 2" Shank 135 _ Split Point M42 High Speed Steel Suitable for Heat Treated Material Stainless Steel High Temperature Alloys Difficult Work Materials Specifications Drill Size 1 _in Decimal Equivalent 1. 000 _in O A Length 6 _in Flute Length 2 3 4 _in Point 135 _ Split Point larger image Finish Gold Shank Type Round Shank Size 1 2 _in Material M42 High Speed Steel Suitable For Difficult Work Materials _ Heat Treated