Cobalt Drill Bit Set- 115Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal, Stainless Steel, Cast Iron and Wood Plastic with Metal Indexed Storage Case, 1/16″ – 1/2″ 115 PIECES INCLUDED: 29pcs Fractional Size:1/16″ to 1/2″ in 1/64th increments; 26pcs Letter Size: A To Z; 60pcs Numbered Size: #1 To #60. HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance. PRECISE 135° SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster. PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials. ORGANIZED HOLDER: Set includes the drill bit holder with size index for easy storage and organizing. Our goal is to provide high-quality products and excellent customer service. Feedback will be left automatically after we receive your feedback. We would try our best to help you solving any problem. (Orders are not processed on weekends & holidays). Leaving correct address can minimize delay. International buyers please note. Local pick-up is unavailable at the moment. We devote ourselves making EVERY CUSTOMER in 100% Satisfactory and resolve any problem. We highly value and appreciate your business. If you do not get a response from us, then please check your junk or spam mailbox. We are committed to resolve all issues in a friendly and satisfactory manner.