Product Description A wide range of products, including DTH Bits, DTH Hammer, DTH Drill Tube, ODEX & RC Drill Tools, Down The Hole (DTH) Drilling Spare Parts, Diamond Grinding Cups/Pins for Button Bits Sharpening. Down-the-hole rock tools (drilling tools) are rock drilling equipment which takes compressed air as power source to partially transfer impact power into drilling holes. An air distributing device in a top hammer controls a piston to move back and forth. An impact device arranged in the front of the top hammer transfers the impact powder to a down-the-hole bit to crush rocks. • Our product range covers the most diverse applications in mining, natural resources exploration, water wells, quarries and civil works. • Our products go from 3 to 25 inches drilling diameter. • Jinquan corporation enhances its product line with a number of accessories and peripheral products, seeking to add value to the end user of Down the hole equipments. DTH Bits For DTH Bits, Various low pressure and high pressure DTH bits are available. Low pressure DTH Bits diameter ranges from 66mm to 205mm, are used to equip with our Jinquan series low pressure hammers. Other low pressure DTH bits are available too upon customer's shank drawing or samples. Diameter: From 76mm to 305mm. Bit Shanks: DHD3.5, DHD340, DHD350, DHD360, DHD380, COP34,COP44,COP54,COP64,COP84, SD4, SD5, SD6, SD8, TD40,QL50,QL60,QL80, Mission 40, Mission 50, Mission60, Mission 80, BR1, BR2, BR3, Mach33, etc. Face Design: Flat face, Convex face, Concave face, DGR. Carbide Insert: Hemi-spherical(round), Parabolic(semi-ballistic), Ballistic(conical).