ITEM NAME:3pcs HSS Step Drill Bit Set Spiral Cutter Tools Change Speed Black 4-32mm Description: Constructed of industrial high speed steel with titanium nitride coating for durability and strength For plastic, aluminum, wood, copper, stainless steel and other types of sheet metal. Two-flute spiral grooved design deburrs chip, dust and debris For 3 standard spiral step drill bits can drill 32 different size Specification: Type: Step Drill Material: High Speed Steel Size: 4-12mm,4-20mm, 4-32mm Package Includes: 1 Set Step Drill Bit.For 3 standard spiral step drill bits can drill 32 different size. Two-flute spiral grooved design deburrs chip, dust and debris. 1 Set Step Drill Bit. Type: Step Drill. Constructed of industrial high speed steel with titanium nitride coating for durability and strength.
