Engineered with highly strength hardened carbides alloy (HRC65+ hardness), these eccentric drill bits deliver long lifespans than standard steel bit, ideal for metalworking and construction applications eccentric design ensures ±0.1mm drilling accuracy, making it perfect for mechanical manufacturing and electronics assembly requiring strict dimensional control Achieve 500RPM cutting speeds for 60% faster workflow efficiency in production lines, backed by wear resistant hardened carbides construction for consistent for confined space with a compactly 90mm length and lightweight build, reducing operators fatigue during extended tasks like machinery repairs or craft projects Trusted by professional mechanics, enthusiasts, and industrial technicians for its versatilitys 6mm-12mm size ranges and 55mm drilling depth across multiple materials, Manufacturer: RGYBAO