DHD350 135MM high speed heavy duty DTH hammer drill bits
https://www.kqdrill.com/product/dth-hammers/
DTH hammers are used in bench drills, which can transmit high-strength impact energy with low energy loss. Taizhou Kaiqiu Drilling Tools Co., Ltd. is a manufacturer specializing in the production of reaming drill bits and Water Well Drilling Tools. The products are sold overseas and are well received.