Product strengths: 100° tip for the fastest penetration, the most precise centering and guidance. No "walking," even on curved surfaces. No scoring required. 140° cutting shoulder for clean cuts; drills perfectly round holes with clean exit holes and minimized burrs. No jamming in multiple layers of thin material. Solid ground spiral flutes for high-precision drilling and quick chip removal. Robust reinforced mesh structure for added strength and durability, without breakage. W9 cord steel (HSS) for sharp cutting edges and excellent heat resistance. Hardening for outstanding wear resistance. Hardness of 63-66 HRC. Triple-flatted shank prevents slipping in the drill chuck. No damage to the drill bit from slipping. Safe and secure clamping, especially when using quick-change drill chucks. Warranty coverage: No warranty.