The BlueSpot HSS Step Drill is manufactured from high-speed steel for increased durability and cutting power. With 14 Steps: 2mm (4-6mm) and 3mm (9-42mm) increments. Titanium coated to reduce friction and heat. Specially designed for precision drilling of holes in aluminium, brass, copper, plastic, steel and wood.Additional Information:• Min. Size (mm): 4• Max. Size (mm): 42• No. Steps: 14
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