WAS HOOKING UP DUMP BOX UNDER MBC EXTRUDER TO MOVE IT AND REPLACE WITH EMPTY ONE. WHILE HOOKING UP THE BOX TO A LARGE CHAIN W/SLOTTED FLAT RECTANGULAR PIECE OF IRON ON END WHICH MUST BE PLACED OVER LIFTING RODS ON SIDES OF DUMP BOX. HOOKED ONE SIDE WITH NO PROBLEM BUT WHEN FLAT PIECE OF IRON SWUNG INTO PLACE ON OTHER SIDE, RT. PINKY FINGER WAS CAUGHT IN PINCH POINT. STITCHES.