... is fired by vacuum 2.Application:solid wall,water well drilling 3.rock drilling tool rock drilling tool Alloy steel Body, made by material ... guaranteed.The complete tools apply for foundation creation,solid wall,water well drilling,trenching,mining,tunnelling. Place of originLiaocheng.ChinaApplicationDrilling,Trenching,Mining ... .5 Million - US$5 Million Export Percentage:81% - 90% Rock drilling tools