These Teng Tools wrenches are made from strong chrome vanadium steel The set consists of 3 hook spanners with 3 pin adaptors and 2 spare pins Ideal for use to work on locking nuts which have a series of notches cut in their outer surface The hookpin is placed in one of the notches and the handle turned to loosen or tighten the nut The wrenches are supplied in a handy storage tray with a removable lid and dove tail joints Suitable for use on its own or as part of the Teng Tools TC control system The TTP08 8-piece set contains the following 3 x Hook handles 34in to 2in 114in to 3in and 2in to 434in 3 x Pin adaptors 4mm 5mm and 6mm 2 x Spare pins 6 and 8mm