TOOLMAYS M35 Cobalt HSS Step Drill Bit, 18 Steps

TOOLMAYS M35 Cobalt HSS Step Drill Bit, 18 Steps

• 18 STEP SIZES IN ONE BIT：Drill 18 hole diameters with a single bit — 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1-1/16", 1-1/8", 1-3/16", 1-1/4"
• M35 COBALT HIGH SPEED STEEL：High-cobalt M35 HSS construction provides the strength, heat resistance, and wear resistance needed for demanding metal drilling tasks
• NANO TiAlN COATING FOR LONGER LIFE：Nano TiAlN coating delivers superior wear resistance and heat resistance up to 1500°F — outperforms standard TiN coatings for longevity
• SPIRAL FLUTE DESIGN：Spiral flutes clear chips faster and reduce vibration through each step, enabling smoother cuts and better control
• 3/8" TRI-FLATTED SHANK FOR STABLE GRIP：The 3/8" tri-flat shank reduces slippage and provides a secure fit in cordless drills, drill drivers, and drill presses
• Tips: Use cutting oil or lubricant during drilling to reduce friction and heat buildup, especially when working with metal. As step drill bits are wear items, regular inspection and timely replacement are recommended under heavy use.