Established in 2005,JESSIN ROCK DRILL CO.,LIMITED is a professional manufacturer of rock drilling tools. The main products are DTH hammer, DTH button bit, DTH drill bit, dth hammer bit, thread bit, PDC bit, impregnate diamond bit, electroplate diamond bit, surface set diamond bit, drill rod, drill pipe, shank adapter, sub, reaming shell. Which are widely used in surface drilling, underground drifting and tunneling, Power and Water projects, quarries, furnace enterprise, etc. 1)DTH hammer sizes: 3", 3.5", 4", 5", 6", 8"12”/DTH hammer shank styles: DHD3.5, DHD340, DHD350, DHD360, DHD380, SD4, SD5, SD6, SD8, Mission40, Mission50, Mission60, Mission80 2)DTH Bit diameter: 64mm to 400mm/Bit face: flat, concave, convex and drop center. /Button shape: spherical, ballistic, semi-ballistic 3)Button bits, connection tapered or threaded, diameter from 33mm to 127mm; 4)Cross bits, connection tapered or threaded, diameter from 28mm to 95mm; 5)Coupling sleeves, R25, R32, R38, T38, T45, T51;