1, high wear-resistant productsIn 2, easy to replace, easy loading 3, high quality, low pricesIn 4, the product through th Coal Mining Bits/Mining Tools We can supply bits with holders for foundation, such as U82, U84, U85, U92, S135, S150, S170, etc. They are widely used in foundation drilling, rotary drilling, trenching, tunneling, mining, etc. Our product are in high quality, reasonable price ...