360 Rotating Sawzall
Milwaukee tools recently unveiled it’s 360 degree rotating Sawzall reciprocating saw. As you can see from the above animation (web circa 1998), you can change the cutting angle of the saw while keeping your arm and wrist in the same comfortable position. You no longer need to contort your body and shoulder to accomodate cutting a circle or sharp angle.
Super Sawzall Kit with a 360° rotating handle [Milwaukee]