29 pc Cobalt M 35 Metal Index Drill Bit Set, 1 16 in to 1 2 in Cut dia ORS NASCO 4 in Prop 65 NO 4 in Prop 65 NO Quantity 1 per pack Quarterly Flier NO Special Order NO Speed [Max] 2400 RPM Stock Status In Stock Thickness [Nom] 1 4 in Welding Catalog NO Wt forming and crimping jobs easier Constructed of M 35 5 percent cobalt high speed steel for super abrasive resistance in tough metals Cobalt steel extends cutting edge life and maintains cutting life after resharpening Extra hard drill for greater wear 135° split point tip starts on contact cuts with less force Removable cartridges: easy to carry bits from case to worksite