Stanley essential screwdrivers have bars made from chrome vanadium steel which resists bending and snapping the handles are made from polypropylene with tpr overlay for increased comfort and reduced fatigue increased torque can be applied by using another bar through the hole at the top of each handle this set of 8 contains the following 3 x phillips ph0 x 50mm ph1 x 75mm and ph2 x 100mm3 x flared slotted 3 x 75mm 55 x 100mm and 8 x 170mm2 x parallel slotted 4 x 100mm and 65 x 150mm