Draper expert cross slot engineers screwdrivers in display packs draper expert 43531 expert quality professional screwdrivers have chrome vanadium steel blades hardened tempered with satin chrome plated finish and sand blasted tips the generous size handle is manufactured from high quality transparent pvc colour coded handles for easy recognition some blades have hexagon bolsters which enable extra power to be applied by use of an open end spanner display packed on individual storage