No matter working on concrete,masonry,asphalt or natural stores,Weiwang chisel series are most excellent tools. They are not only convenient for loading and unloading bat are effectively anti-slop. They can transmit all dynamo of hammer drill, on to working pieces to improve precision of chisel and reduce abrasion to the minimum. Its quite easy to re-grind abraded chisel, for the regrinding can be done on bench grit conveyor without re-casting, which effectively extend its performance life.