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. 15 PIECES 1/16″-3/8″. 21 PIECES:1-16:-1/4. 29 PIECES:1-16:-1/2. COMOWARE COBALT DRILL BIT SET. 16″ -1/2″, A to Z, #1-#60. HSS WITH 5% COBALT. 14.65 x 5.08 x 2.83 inches; 7.61 Pounds. We reserve the right to cancel any order for any reason at any time. We are not responsible for undeliverable addresses. Your feedback very important to us, after you get your package and you are. Satisfied with our service. If you have any problem with your order / any questions please before leave any type of feedback. Thank you for shopping at our store.