The Arm Chopper Frame is a guillotine type apparatus, where you slice through your own, or an assisting spectator’s arm, without harm.  The frame can be opened and shown devoid of trickery.  The blade extends beyond the frame, allowing the audience to keep track of it at all times.
First display blade slices through fruits or vegetables placed in holes in the middle and bottom of frame. Then place your arm in the middle hole, and a cucumber in the bottom hole. Slam down the blade, and it slices through the cucumber, leaving your hand unharmed. Clean and convincing. Well made prop in laminated wood and metal.