Features: Bronze Tempered (Bronze Oxide) Surface Treatment High Speed Cobalt Steel Tool Material ANSI ? Tap Standards 4D Usable Tool Depth to Diameter Ratio Drill Point 135 Cylindrical Shank / Straight Shank Right Hand Rotation / Cutting The Precision Twist Drill C115COMBC set of 115 drill bits covers a wide range of drilling jobs consists of the most popular bits: R10CO sizes 1/16? to 1/2" in 1/64? increments, R18CO in sizes from N1 to N60; and R15CO sizes A to Z. All drill bits in the set are manufactured from premium High Speed cobalt, and can be used for drilling tool steel and other hard materials, whilst the 135 degree split point is an aid to self-centering and reduces the amount of force needed to drill the hole. The drills have a heavy duty design which is recommended for use in difficult materials and applications. With a bronze oxide finish to prevent workpiece material from sticking to the cutting edges of the drill, you can be sure you're drilling accurate holes with the C115COMBC set. Details: EAN number: 086071997067 EDP number: 099706 Product name ISO: C115COMBCSET Ordering code ANSI: C115COMBCSET Gross weight - grams: 3840 Products in set: Yes Styles in Set: R10CO, R18CO, R15CO Diameters in Set: 1/16-1/2 x 64ths, N1-N60, A-Z Number of items in set: 115 ANSI: C115COMBCSET ISO: C115COMBCSET