Maywoqi Four Spiral Flute Cobalt Step Drill Bit, 3/16"-7/8" M35 Cobalt Step Drill Bit Wear-Resistant AlTiN Coated, 1/4" Hex Shank for Hole Drilling in($22.99Value)

Description

SUIT YOUR NEEDS: 12-step sizes include3/16",1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 13/16", 7/8". The 135° cutting angle reduces self-wear and provides a larger stress area, resulting in cleaner, more efficient drilling for home repairs, and metalworking. IMPROVED Stability: Four cutting blades are designed for increased stability, effectively reducing deviation during the cutting process. It offers a significantly longer service life compared to regular step drills. M35 Cobalt Material: M35 cobalt high-speed steel, through heat treatment, achieves toughness and bending strength that surpasses standard high-speed steel, making this step drill bit more suitable for cutting hard materials. AlTiN Coating: With 89HRC surface hardness, the step bits coated with aluminum titanium nitride. This coating offers superior resistance to heat, wear, and corrosion, with high adhesion and low friction. Widely Application: With its powerful drilling capability, our step drill is suitable for piercing holes in various materials, including thin metal, copper, aluminum, iron, carbon steel, wood, and plastic.