EMPLOYEE WAS REMOVING A ""J"" BOLT ON A SCREEN WHEN THE WRENCH TURNED AND HIS RIGHT MIDDLE FINGER CONTACTED A SCREEN ADJACENT TO THE ""J"" BOLT. HE SHOULD HAVE POSITIONED THE WRENCH SO THE ACTION WOULD HAVE DIRECTED HIS HAND AWAY FROM THE SCREEN. RESULT WAS A 1/2"" CUT TO THE RIGHT MIDDLE FINGER, REQUIRING 3 STITCHES.