This Draper TX-STAR® Tamperproof hard grip screwdriver set offers a selection of popular sizes. Each screwdriver has a hardened chrome vanadium steel round blade with chrome plating for corrosion protection. The larger sizes have a hex bolster so they can be turned with a spanner for extra torque. The blade tips are magnetic to hold the screw in place, making it easier to deliver more accurate force and precise fastening and loosening. The tips also have a black phosphate coating for added durability. The comfortable moulded grip handles are made from high impact resistant plastic, which is easy to clean and resistant to oils and chemicals. The shaped handles help ensure the screwdrivers do not roll off flat surfaces. There is a hang hole integrated into the handles for convenient storage.