Premium Materials: M35 5% Cobalt High Speed Steel provides extended life compared to regular drill bits. Durable and strong for longer use. Heat Resistant: Our high speed steel twist drill bits should be operated at 1500 RPM or higher for maximum efficiency. The straight shank provides a firm and precise hold, compatible with standard chucks and regular round collets. Twisted design and performance: precise 135° split point, gold oxide finish and shanks round lines. Prevents exits, removes splinters and particles faster. Product fully precision ground, ensuring chips move easily. Professional grade item with a wide range of uses: M35 high speed steel with cobalt is best suited for hardened materials. Particularly effective in cutting hard metals such as steel, stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and can also be used for softer materials. Easy to store and use: 13 piece set of M35 high speed steel twist drill bits with cobalt,