3*4mm YG8 Rotary Cutting Tool File Set - Silver (10PCS)
Can process cast iron cast steel carbon steel alloy steel stainless steel copper aluminum etc. marble jade bone etc. nonmetal. Processing hardness can up to HRA> / = 85. Basically can replace with handle small grinding wheel and no dust pollution. Efficient production 10 times higher than traditional file 10 times higher than small grinding wheel with handle.