Application: Inserting for rock cutter machines and core drill bits for geotechnical (mining,water well drilling) tunneling, quarrying, construction and machinery aspect. Working formation: Soft rocks and sea drilling with hardness 3-6 degrees, such as lime rock, marble, shale, etc, and in medium to hard rock with coarse grains formations Popular size: 3x3x10xr1.5, 1.5x1.5x5, 3x3x3,4x4x4,6.3x3.3, Quantity Per Month: 500000 Delivery Way - Date Of Delivery: 7-10days
