The vonhaus 12 piece mechanics screwdriver set is a must have in the tool arsenal of every garage and workshopr r each screwdriver features hardened tempered heat treated carbon steel blades with magnetic tips to hold screws firmly each shank goes completely through the handle joining with the hex bolster making the screwdrivers perfect for professional user r precision formed tips offer an accurate screw fit whilst reducing wear and prolonging lifer r designed with comfort grip moulded