... angle grinder grinding stones 1,for concrete,terrazzo,epoxy 2,siemens motor,220V,380V 3,aluminum gear 4,stainless steel angle grinder ... touch wall and grind corner.Advanced angle grinder grinding stones HWG 59 would not leave ... grinding, finepolishing, crystallization, preparation, maintenance.Performance:1, The frequency converter could change the motor ... :... HWG 59 angle grinder grinding stones