EE WAS FABRICATING A MACHINE GUARD AND HAD DRILLED AND TAPPED HOLES FOR SEVERAL BOLTS TO ASSEMBLE THE GUARD. WHEN TAKING THE BOLTS OUT TO OPEN THE GUARD FOR FURTHER WORK, HE STRUCK HIS LEFT MI DDLE FINGER KNUCKLE ON A SHARP METAL EDGE, CUTTING HIS KNUCKLE AND REQURING 5 STITCHES INT HE KNUCKLE AREA.