Liaocheng Jinquan Construction Machinery Co.,Ltd (Formerly Jinquan (Golden Spring) Rock Drilling Tools Co., Ltd) was established in 1984, located in Economic Development Zone Of Liaocheng, Shandong Province, China. It belongs to the group company of Golden Spring Drilling Limited. We are one of the biggest production bases of all kinds of rock drilling tools, mainly produce "Jinquan" brand rock tools, including threaded button bits, tapered button bits, cross drill