Draper 7 piece mechanics screwdriver set draper 27031 satin chrome plated chrome vanadium steel round blades hardened and tempered with sand blasted tip some sizes have hexagon bolsters which enables extra power to be obtained by use of a spanner square matt black handles manufactured from high impact resistant plastic packed in case with insert and clear lid display packed br br b b br br pz type products are compatible with pozidriv 174 supadriv 174 fixing systems br pozi