Specifications : 11pcs. 10pcs Drill bits: 1/4”, 5/16”, 3/8”, 4/5”, 1”, 1-1/8”, 1-1/4”, 1-3/8”, 1-3/4”, 2-1/2”(6/8/10/20/25/28/32/35/45/65mm), Connection: Triangle Shank. Beveling bit: 2”(0-50mm), Hex Shank Multi-functional : For various materials: ceramic porcelain tile, marble and granite, etc. Beveling bit: for chamfering, rounding, beveling, trimming and shaping formed holes. Dry or wet use 1 Set Is Enough : This set includes an EVA mould positioner for locating the hole. With drill bits of different sizes and a chamfer bit, you can get different holes as you want, remove burrs and improve existing holes. It is a value-for-money choice Good Customer Experience : Good heat dispersion and special chip clearance design give you a smooth drilling experience. Good finishing effect reduces unnecessary debris and damage, saving your material. Using hard materials and advanced technology, the working speed and life span of these drill bits are guaranteed Attention : Suitable for hand drills, including corded drills and cordless drills. Higher speed is beneficial to longer lifetime. Impact pattern of the machines is NOT supported. These tools are neatly set in a bag, convenient to store and carry