【Brillent Tool】HSS Step drill bit set satisfied multiple size, replace 29 separate drills. Smooth cutting, sharp and sturdy. Using long time without blunt.
【High Grade Material 】Step drill bit made of high quality high speed steel 4241 which is hard and sturdy.Combined with a titanium coating,more capable and durable.
【Double Cutting Blades】This HSS steel large step is designed with double cutting blades spiral design, much better than the standard design.faster and sharper, also more durable.
【TRI-Flatted Shank】This drill bits has different 3 size shanks. Bit #1 (5 steps): 4mm, 6mm, 8mm, 10mm, 12mm; Bit #2 (9 steps): 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm; Bit #3 (15 steps): 4mm, 6mm, 8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm, 26mm, 28mm,30mm,32mm
【Wide Application】This step drill compatibles with most power drills and impact driver.Suitable for home DIY and engineering. Easily cut hardness below 25 °,like sheet metal, wood, aluminum, plastic,etc.
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