... :JIS, ANSI, DIN, GB, ASME, BSW, ISO 3.Material:stainless steel, iron,zinc,brass Specifications:Size:PB1.2 ... Round, Truss, Button, PF, Pan washer, Cheese, Countersunk, Fillister, hexagon, Hexagon washer head, Hexagon socket button head and etc. 3. by type ... of drive inserts Phillilps, Slotted, Pillips/slotted combination, Cross recess type, H drive, Hexagon socket, Square socket, Torx, ...