Sealey 13 piece impact socket set 3 4insq drive metric imperial sealey ak686 p this impact socket set from sealey includes 13 standard walldrive reg sockets in a range of metric and imperial sizes with 3 4in square drive p p walldrive reg sockets 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 fixings to be easily tackled p sealey ak686 impact socket set 13pc 3 4 sq drive metric imperial