Four Spiral Flute Cobalt Step Drill Bit Impact Ready Unibit Step Drill Bit, Hex Shank Step Bits for Metal, Aluminum, Wood

Four cutting blades design guarantees a faster and smoother cutting. Feels like a hot knife through butter!

COATING - With surface hardness, harder materials can be cut and higher cutting speeds can be achieved

COBALT HSS STEP DRILL - Prefect for thick Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets.

Blade Slotted Design:PERFECT for drilling in stainless steel.Also suitable for drilling metal plates, aluminum plates, copper plates, wood, plastics, etc.Firmer cutting, higher drilling accuracy, faster drilling, better chip removal.

Step drill bits&Coating:Ultra-high temperature heat treatment and Surface coating treatment.Higher hardness, higher wear resistance and durability.

Wide Application:Suitable for hand drill, table drill, please use flat drill mode, DON'T use impact and hammering mode;Recommended speed