Dayu has produced industrial & professional power tools since 1995. Angle grinders are our strongest product. Power tools that are heavy duty enough for stone industry is our special feature. With armature life = 600 hours +, our tools are sold domestically to Chinese factories, shipyards, construction sites, carpentries, etc. with a good reputation in the past years (our own brand: DAYU, DKY) (You can imagine how hard-working Chinese workers are using their tools, very heavy duty and long time).