Manufacture and supply various full series of screwdriver bits, nut setters, nut drivers, sockets, socket adapters, bit holders Screwdriver bitMaterial types ... injection case, blow case, PVC bag, color boxNut driver (nut setter)Material: Cr-V steel, types: non-magnetic and ... magneticSurface treatment: Zn-coating, sandblasted, Ni-coating, Cr-coatingFitting nut size: 4mm, 5mm, 5.5mm, 6mm, 7mm, 8mm, ...