This comprehensive screwdriver set is ideal for virtually every trade and task from dealing with screws and fixings on site working on cars motor bikes and bicycles to working on machinery or performing household diy tasks inside or out the reason for this is that this set contains seven of the most commonly used screwdriver tips slotted phillips and pozidriv each screwdriver blade is made from chrome vanadium steel and the tips are correctly hardened and tempered so that they retain their shape