Features: Engineered with high strength hardened carbide alloy (HRC65+ hardness), these eccentric drill bits deliver long lifespans than standard steel bit, ideal for metalworking and construction applications. precise eccentric design ensures ±0.1mm drilling accuracy, making it perfect for mechanical manufacturing and electronics assembly requiring strict dimensional control. Trusted by professional mechanics, DIY enthusiasts, and industrial technicians for its versatilitys 6mm-12mm size ranges and 55mm drilling depth across multiple materials. Optimized for confined space with a compactly 90mm length and lightweight build, reducing operators fatigue during extended tasks like machinery repairs or craft projects. Achieve 500RPM cutting speeds for 60% faster workflow efficiency in production lines, backed by wear resistant hardened carbide construction for consistent performances. Specifications: Component:hardened Steel Diameter:Approx.6mm/0.24in, 8mm/0.32in, 10mm/0.39in, 12mm/0.47inch 4Option Type; Process: precise processing, surfaces hardening treatments Total length:Approx.90mm/3.54inch Working depth:Approx.55mm/2.17in Handle diameter:Approx.6.35mm/1/4in Cutting speed 500RPM | 3times more wear resistance Accuracy:±0.1mm Use scenarios:Industrial Applications, DIY Handicrafts,Home Decoration,Machinery Manufacturing and other fields Package Includes: Package A 2pcs Eccentric Drill Bit Package B 3pcs Eccentric Drill Bit Package C 4pcs Eccentric Drill Bit note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.