Sealey 16 piece impact socket set 1 2insq drive metric imperial sealey ak684 p this 16 piece impact socket set is part of the sealey duometric reg range where no imperial size socket is included where there is a metric equivalent this method gives maximum coverage of sizes with the minimum number of sockets p p all sockets are walldrive reg and allow transfer of up to 30 more torque to the fixing before the risk of damage to the corners of the hexagon this also permits damaged fixing