- Drill bit dimension: 25/64 inch diameter x 3-3/4 inch flute length x 5-1/8 inch overall length - Cobalt material: HSS M35 cobalt steel enables long drilling life and fast drilling performance - Surface treatment: Gold Oxided Ember Finished Treatment Keeps High Hardness of Body Shank - Split Point Angle 135 Deg: Split Point 135 Deg. Guarantees Self-Centering and Easy Quick Penetration Benefits and why you need it - High wear resistance and durability for demanding metal drilling tasks - Self-centering starting point reduces wandering and improves hole accuracy - Enhanced drilling life in tough metals thanks to cobalt alloy composition - Designed for reliable performance when drilling through hard metals and common workshop materials Applications and use scenarios - Fabrication and automotive repair: drilling through steel components, brackets, and hardened fasteners - Metalworking and maintenance: drilling stainless steel, cast iron, and other hard metals with consistent results - Construction and DIY projects: precise starting holes and efficient penetration in metal workpieces Specification and features at a glance - Drill bit dimension: 25/64 inch diameter x 3-3/4 inch flute length x 5-1/8 inch overall length - Material: HSS M35 cobalt steel for long life and fast drilling - Surface treatment: Gold Oxided Ember Finished Treatment to maintain high hardness of the body shank - Point geometry: 135 degree split point for self-centering and easy penetration