Insert screwdriver bit set 1, material: S2 (hardness) 2, good quality 3, professional

Insert screwdriver bit set

Manufacture and supply various full series of screwdriver bits, nutsetters, nut drivers, sockets, socket adapters, bit holders and quick changeconnectors for screwdriver bits

material types:Cr-V 6150,8660,S2

Surface treatment:sandblasted, tin-coating, Cu-coating, Ni-coating, Cr-coating, Zn-coating

Head types:PH, PZ, slot, Torx, square, hex, hex-plus, Z-spanner, Torx hollow, Torx plus, tri-wing

Type:single head, double head, head with round neck,non-magnetic and magnetic

21pc Insert screwdriver bit set (25mm)