We are longcheng tools group locate in shanghai, professional in power tools,Our high-quality products as following: 1. masonry tools--electric hammer drill bit, masonry drill bit, hole making drill bit, masonry chisel, combination drill bit set…2.tools for metal --twist drill bit, bimetal hole saw, steel hole saw, grinding wheel, steel wire wheel…3. tools for wood -- router bit, wood hole saw, wood drill bit, circular saw blade, jigsaw blade, planer blade …4.diamond tools---diamond saw blade, core drill bit, diamond grinding disc, polishing pad, 5.other tools—power screwdriver bit, hammer, screwdriver, pliers, wrench,etc. All products obtained ISO9002 and CE certificated!