Changsha Sollroc Engineering Equipments Co. Ltd. is a leading manufacturer of rock drilling tools, like DTH hammers and bits, DTH drill pipes, RC hammers and bits, tophammer button bits, coupling, cross bits, drill rods located in Changsha, Hunan, China.We have experience in this field of DTH hammers and bits for 20 years experience.Owing to high quality, professioanl serivce and competitive price, we have good reputation for our customer all over the world, such as France, Spain, Italy, South Africa, etcWe can provide specifications:DTH hammers and bits range:3" DTH hammer shanks : DHD 3.5, COP 34, COP 32, Mission 30, BR 3, Mach 303; bits (90mm - 105mm) 4" DTH hammer shanks: DHD 340/COP 44, COP 42, QL 40, SD 4, Mission 40; bits (105mm- 130mm) 5" DTH hammer shanks: DHD 350/COP 54, COP 52, QL 50, SD 5, Mission 50; bits (130mm- 165mm) 6" DTH hammer shanks: DHD 360/ COP 64, COP 62, QL 60, SD 6, Mission 60; bits (152mm- 203mm)8" DTH hammer shanks: DHD380, QL 80, SD 8, Mission 80; bits (200mm- 305mm)10"DTH hammer shanks: SD10,Numa100; bits(254mm-330mm)12"DTH hammer shanks: DHD1120,SD12,Numa120,Numa125; bits(305mm-600mm) DTH opener bits: 4"-10" from 82/165mm to 445/660mm