Rung See manufactures diverse kinds and lengths of precision bit sets, including phillips bit set, slotted bit set, pozi bit set, hex bit set, star bit set and spline bit set. The specifications of our bit sets are 1/4", 5/16" and 10mm. Furthermore, there are two ways of surface treatment in Rung See's bit sets, sand blast and manganese phosphate. We also offer OEM / customized service, welcome to contact us for more specific information.