Reversible precision blades ensure a perfect fit every timeProfessional black plastic box with hangers and EVA hold each item firmly and securelyFeatures a fast turning swivel cap for easy operationThe handle is made of quality anti-rust aluminum alloyThe insertable screwdrivers are constructed from 8660 Cr-Mo-V steel with chrome platingThe handle is 90mm in length, and when inserted, the 52mm screwdrivers add 20mm of length10 pieces in all, with 9 double-ended interchangeable screwdriver bits (equaling 18 screwdriver bits), and 1 anti-rust swivel cap handle