COMOWARE 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. Material: HSS M35 Cobalt 5%. Angle Point: 135 Degree. Shank Type: Straight Shank. All woodworkers need this set. 115 pieces are included for you to choose the most appropriate one, and it comes in a portable case. And all drills can be used for cutting metal, plastic, wood, etc. HSS M35 with 5% Cobalt provides ultimate higher heat and abrasive resistance which ensures a longer service life. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. We usually respond within 24 hours on weekdays. Thank you for shopping at our store.