name:fasteners materisl:carbon steel,stainless steel,mild steel, ... , Hexagon socket button head and etc. 3. by type of dr ive inserts Phillilps, Slotted, Pillips/slotted combination ... , Cross recess type, H drive, Hexagon socket, Square socket, Torx, Triangle ... copper plating, mechanical galvanization, hot dip galvanization, etc. fasteners