Product Description 
★Professinal design, beauty appearance and portable screwdriver set is easy to use
★Multipoint and adjustable extension bar is easy to disassemble and can be changed the length according to different requirements
★High quality and precision screw heads of all types are suitable for work in different   areas
★The handle of ergonomic design is easy to operate.
★Precision screw heads under high temperature processing are made of high quality chrome-  vanadium steel (6150#),whose HRC is from 52-56 degree.