T51-102mm Top Hammer Drill Bit Test
T51-102MM BIT TEST ON SITE On May.24th, 2022, we have run a test in China quarry, the rest is satisfying. Our T51-102mm threaded button bits drilled more than 400 meters, which is 10% more than other brands. Product Before Test Product After Test 1 Product After Test 2 The Straight Hole
