Deli M35 High Cobalt Twist Drill Bits for Concrete Metal Stainless Steel, Industrial Grade, 3mm, 10 Pieces Box

30% increase in durability and long-lasting strong drilling performance

Stable and sharp feed with improved drilling efficiency

Anti-burning and anti-breakage features to maintain hole accuracy

Compatible with hand drills, lithium drills, machining centers, and bench drills

Hand drill power ≥ 750W; cordless drill voltage ≥ 24V

For hole diameter > 6mm, pre-drill with 3.2-4mm bit before enlarging

Maintain drill speed between 80-120 rpm to avoid overheating and bit damage

Keep drill perpendicular (90°) to stainless steel surface during operation

Secure drill chuck tightly; use shortest possible drill bit length; avoid overly sharp edges

Apply even force and stabilize the base during drilling