Draper expert 16 piece screwdriver set draper expert 56773 b i expert quality i b chrome vanadium steel blades hardened tempered with satin chrome plated finish and sand blasted tips the handle is manufactured from impact resistant heavy duty soft grip polypropylene with colour coded handles for easy recognition some blades have hexagon bolsters which enable extra power to be obtained by use of a spanner packed in blow mould case with display sleeve br br b b br br pz typ