... Plating, Anti-slipping patchCategory we can process1. by componentsBolts, Screw bolts/Studs, Nuts, Tapping screws, Wooden screws, Washers ... Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, Hexagon washer head, Hexagon socket button head and etc.3. by type ... combination, Cross recess type, H drive, Hexagon socket, Square socket, Torx, Triangle drive, Indented hexagon and etc.Certificates ...