100% Satisfaction Satisfaction Guaranteed. Tiain Coating Cobalt Drill Bit Set, 29Pcs Multifacet Tip M35 High Speed Steel Bits for Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1/16″-1/2″. 29pcs Cobalt Drill with TiAIN Coating. 7.5 x 5 x 2.5 inches; 3.15 Pounds. 5.0 inches x 7.5 inches x 2.5 inches. Weight: 3.15 lb 5.0 inches x 7.5 inches x 2.5 inches. Weight: 3.15 lb. ?? TiAIN Coating? Each drill bit surface of this cobalt drill bit set is coated with TiAIN coating. Compared to ordinary drill bits, it can achieve faster cutting speed and also cut harder materials. The service life of drill bits can also be extended by nearly 5 times. ?? Multifacet Tip Design? HSS cobalt drill bit set for hardened steel has a special design of multifacet tip at the head, which greatly improves the drilling efficiency compared to ordinary drill bits. It is suitable for hardened steel with excellent cutting performance. ?? Various Sizes? 29 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″, 17/64″, 9/32″, 19/64″, 5/16″, 21/64″, 11/32″, 23/64″, 3/8″, 25/64″, 13/32″, 27/64″, 7/16, 29/64, 15/32″, 31/64″, 1/2, can meet more needs. L as plastics, wood etc. ?? 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. ?? Easy Storage? The drill set includes drill holders with size indexes and is packaged in a small, strong package for easy storage and sorting. 29 PIECES: 1/16″-1/2″. 1/8- 10 PIECES. 1/4- 10 PIECES. 3/8- 5 PIECES. 1/2- 5 PIECES. We’re a start up with the main goal: to love our costumers. Our Staff works hard every day for giving to you the best high quality items and the best costumer care. We are always working hard to ensure your package arrives as soon as possible. We try over very best to make sure every customer is completely satisfied. If there’s a problem, message us! We’re happy to help.