The Hitachi 728493 General Purpose Drill and Drive Bit Set with DuraCore is the perfect bit set to accompany your Hitachi Power Tools. Combination of masonry, wood and metal drilling bits. Includes Phillips, slotted, square, Torx and hex bits. Hitachi DuraCore treated products are manufactured utilizing a proprietary treatment superior to cryogenic treatment. This treatment strengthens the molecular structure of the metal through to the core. DuraCore is not a coating, so it will never wear off or chip away. Hitachi DuraCore products are revolutionary and no other untreated accessory of similar metal will compare in cutting speed, wear life and durability. Includes: (1) Magnetic Drive Guide, (4) Nut Setters: 1/4-in, 9/32-in, 5/16-in, 3/8-in, (25) Black Gold Drill Bits: (5) 3/64-in, (4) 1/16-in, (3) 5/32-in, (3) 3/32-in, (2) 7/64-in, (3) 1/8-in, (1) 5/32-in, (1) 3/16-in, (1) 7/32-in, (2) 1/4-in, (7) Brad Point Drill Bits: (2) 1/8-in, (2) 5/32-in, (1) 3/16-in, (1) 7/32-in, (1) 1/4-in, (6) Masonry Drill Bits: (2) 1/8-in, (2) 5/32-in, (1) 3/16-in, (1) 1/4-in, 40 Piece 1-in Screw Driver Bit Assortment, (8) Philips: (1) no.0, (2) no.1, (3) no.2, (2) no.3, (8) Slotted: (1) 4-5, (2) 6-8, (3) 8-10, (2) 12-14, (8) Square: (1) no.0, (2) no.1, (3) no.2, (2) no.3. The Hitachi 728493 General Purpose Drill and Drive Bit Set with DuraCore is warranted to the original purchaser to be free from defects in materials and workmanship for a period of 30-days from the original purchase date. Every Hitachi accessory is designed to the highest standards and is rigorously tested for both performance and durability. Since its inception, Hitachi has pioneered innovative technologies that have improved the quality of craftsmanship worldwide. Hitachi is a leader in power tool research and development and has achieved many firsts in the power tool industry. Today, Hitachi continues the tradition of innovation and engineering with new features in addition to classic quality.