MABLEVI M35 Four Spiral Flute Cobalt Step Drill Bit Set 1/8"-7/8", Wear-Resistant TiAlN Coated 1/4" Hex Shank Unibit Step Bit for Metal, Stainless Steel, Aluminum, Wood, Plastic（3Pcs）

FOUR CUTTING BLADE UP TO 4X FASTER - Ordinary step drills are prone to deflection during cutting, four cutting blade design guarantees a faster and smoother cutting, allows swarf escape easily.
ULTRA TiAlN COATING UP TO 10X LONGER LIFE - TiAlN coating has excellent characteristics. As a new coating material, which can minimize the wear of the drill bit during each drilling process.
M35 COBALT PREMIUM STEP BIT - M35 steel is a kind of high speed steel containing cobalt, which has the characteristics of high red hardness, high wear resistance and sintering resistance. M35 cobalt can obtain high hardness (HRC 64-66) through proper heat treatment.
13 TOTAL STEP SIZE - Includes 1/8",5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16",15/32",1/2". Perfect for Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets.
RELIABLE BRAND - Bring you the pleasure of cutting butter blocks. If the hex shank snap off, MABLEVI will repair and replace any defect, without charge, and without waiting.

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