Draper expert 18mm 12 square drive powerdrive impact socket draper expert 28529 expert quality 6 point sockets forged from chrome vanadium steel hardened tempered and chemically blacked for corrosion protection these sockets are for use with air electric or manual impact wrenches display packed draper expert hi torq174 is a registered trademark of draper tools ltd draper expert 28529 22mm 12 square drive powerdrive impact socket