DTH Drill Bits Brighttop Global Co., Ltd. supplies durable DTH drill bits designed for mining, quarrying, blast-hole drilling, water well drilling, geothermal drilling and construction applications. The bits work with compatible down-the-hole hammers to deliver impact energy directly to the rock at the bottom of the hole. Manufactured from selected alloy steel and fitted with wear-resistant cemented carbide buttons, our DTH hammer bits provide a reliable balance of penetratio