Never used product, packaging damaged during transport. Unopened product, repackaged in our warehouses, in perfect working condition, warranty available. High-quality material: 5% cobalt in M35 HSS provides extended service life compared to ordinary drill bits. Durable and sturdy for longer life. Heat resistance: Our HSS twist drill bits must operate and run at 1500 RPM or more for maximum efficiency. The straight shank provides a firm grip and accurate centering, fits standard drill chucks and regular round chucks. Twist design and performance: Precision 135 split point, gold oxide finish and right-hand round shank. Prevents walking, clears chips and particles faster. Precision produced and fully ground, ensuring that chips move smoothly. Professional and Widely Used: M35 Cobalt HSS is more suitable for hardened materials. Particularly effective for cutting hard metals such as steel, stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and wood, and can