EE AND COWORKER WERE IN THE PROCESS OF MAKING A MECHANICAL SPLICE IN THE BELT AT #4A PONY HEAD ON #1 SECTION. EE WAS RUNNING HIS RIGHT HAND ACROSS NAIL BOARD TO MAKE SURE THE NAILS WERE BRAIDED, WHEN HIS COWORKER STRUCK HIM IN THE HAND WITH A 2 LB. FLEXCO HAMMER. EE WAS DIAGNOSED WITH HAIRLINE FRACTURE, RIGHT MIDDLE FINGER.