... ,siemens motor,220V,380V 3,aluminum gear 4,stainless steel angle grinder grinding stones HWG 59 could hold 12 pieces of diamond ... disc plate could 100% touch wall and grind corner.Advanced angle grinder grinding stones HWG 59 would not leave trace on floor ... be chosen:The effect of grinding and polishing:... HWG 59 angle grinder grinding stones