Sk Nut Collet Chuck Nut CNC Tool Holder Accessories ADST TECHNOLOGY CO., LTD. Base Info Model NO.：SK NutMaterial：40crTrademark：lhyTransport Package：Paper BoxSpecification：40Cr materialOrigin：Shenzhen, China Description Pre：Zinc Phillips Flat Head Self Drilling Screw with Nibs Under Head Next：8mm Aluminum One Way Check Valve
