Cobalt Drill Bit Set, 13Pcs M35 High Speed Steel Bits for Hardened Metals. ?? Various Sizes? 13 sets of drill bits include 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 11/64″, 3/16″, 13/64″, 7/32″, 15/64″, 1/4, can meet more needs. ?? M35 Cobalt Drill Bit? The M35 cobalt drill bit is a durable, sharp and robust drill bit suitable for cutting stainless steel, iron castings, copper, aluminum and other soft metals as well as plastics, wood etc. Note that it is not applicable to quenched bolts. ?? Quick and Efficient? The cobalt drill bit set can be used effectively on most soft and hard objects, with a 135 degree point tip and twist design for faster cutting, self-centering to prevent walk-off and faster chip and particle removal. ?? HSS Drill Bit Set? HSS cobalt drill bit set for hardened steel with excellent cutting performance. 13 sets of drill bits for long term use. The inserts are hardened and polished for improved sharpness and precise cutting without wobbling. ?? Easy Storage? The drill set includes a drill case with size indexes and is packaged in a small package for easy storage and sorting. 13 PIECES: 1/16″-1/4″. 15 PIECES : 1/16″-3/8″. 29 PIECES : 1/16″-1/2″. Alloy Steel, Cobalt Steel. 4.13 x 3.03 x 0.67 inches; 3.99 Ounces. 4.13 x 3.03 x 0.67 inches. 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.