Draper expert plain slot flared tip engineers screwdrivers draper expert 43524 the draper expert 95 x 250mm plain slot flared tip engineers screwdriver is a professional tool 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 spa