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 packed in blow mould case with sleeve contents 7 plain slot size 30 x 75mm 50 x 150 60 x 38 60 x 100 80 x 150 95 x 200 and 95 x 250m