When you build a universal binary, Xcode compiles your source files twice—once for each architecture. If you build the source files yourself, you must call lipo as part of your build scripts to merge your architecture-specific binaries into a single universal binary.
Vintage Mac Tools AW234 1/2" Drive Air Pneumatic Impact Wrench Gun. Mac Tools 3/8" Drive Super Duty Air Impact Tool Model AW 225 This Tool has seen a bit of use but is still in good working condition. Air Tools (Pneumatic Tools) MAC AFRIC 1/2″ Impact Wrench Kit with Sockets.