EMPLOYEE WAS TIGHTENING BOLTS ON CRUSHER WITH A MODIFIED FACTORY WRENCH WHEN HIS HAND SLIPPED AND HIS FINGER STRUCK THE KNEE BRACE ON THE TOWER. HE WAS TAKEN TO THE HOSPITAL WHERE HE WAS DIAGN OSED WITH A FRACTURED TIP TO HIS LEFT RING FINGER AND AN AVULSED FINGER NAIL. OFFICE WAS NOT ADVISED OF INCIDENT UNTIL 8/30/01.