PurposeUsed in limited access area on entry doors to install bolts and screwsWrench VariationDouble EndWrench Size5/16Opening Shape12Wrench End TypeBox EndWrench Body TypeOffset-UDrive TypeHandleCenter-to-Center Distance4.00Second Wrench End TypeBox EndSecond Wrench End Size1/2Second End Opening Shape12Where UsedEntry doorsOffset Height6.00Second End Head Thickness0.29