These 1/2" Drive Spline Bits (M10-M18) are manufactured from chrome vanadium steel for increased durability & strength. The set
Includes:: the most widely used spline sizes, & is ideal for removing & applying spline fittings. The set is heat treated, hardened, tempered & fully polished. The knurled sockets provide a secure grip. The set contains M10, 12, 14, 16 &18 in an EVA foam insert for easy storage.