Expert quality chrome vanadium steel hardened tempered and satin chrome plated for corrosion protection sockets have knurled ring for extra grip packed in handy zip carrying case with foam insert web strap handles and display sleeve draper expert hi torq is a registered trademark of draper tools ltd pz type bits are compatible with pozidrivsupadriv fixing systems pozidrivsupadriv are registered trademarks of trifast plc draper tx star bits are compatible with torx fixing systems torx is t