Material: The concrete kit, high-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouth. Ultra-sturdiness and durable, easy to opearation, and long service life.Long SDS plus shank: Come with a SDS puls shank for this cement drill bits, male thread adapter design, match your drill chuck fastening and much more improve speedier drillingWidely application: This cement brick electric hammer drill bit widely used for cutting clean holes in concrete, brick and block work, drilling walls, stones, installation of air-conditioning, etc.Color: GrayMaterial: cemented carbideSize:3Pcs concrete , 1-2/11 Inch(30mm), 1-3/5 Inch(40mm), 2-4/5 Inch(60mm).1pcs SDS connecting rod k 8-7/10 Inch(220mm).3pcs center drill bit. 4-1/3 inch(110mm)Package Contents:3Pcs * concrete drill bits1pcs * SDS connecting rod3pcs * center drill bits1pcs * screwOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.