I'm a P style guy
http://www.princessauto.com/pal/product/0430266/P-Style-Couplers-%26-Plugs/2-Pc-%22P%22-Style-Tru-Flate/Parker-Interchange-Series-Male-Air-Quick-Coupler-Plugs
I have several wrenches that I have cut in a pinch to make line wrenches tha twork well. They tend to spread a bit when cracking fittings loose but nothing major.
I have the williams set. Handles are the same but not sure if the blades are. I have broken everyone but just had snap on blades put in as they broke and now I have snap on screw drivers.
Besides the obvious of to hammer things. Does it have a specific job?
http://www.ebay.ca/itm/VTG-BRASS-ODD-HEXAGON-FLAT-END-NON-SPARKING-10-12-OZ-BALL-PEEN-HAMMER-/290686152831?pt=LH_DefaultDomain_0&hash=item43ae3eb07f