EE WAS WORKING WITH CO-WORKER TAKING COAL MILL APART FOR #2 KILN. THEY WERE IN THE PROCESS OF REMOVING A PLATE WEIGHING ABOUT 150 LBS. EE WAS REMOVING PIN HOLDING THE PLATE, WHILE CO-WORKER WA S SUPPORTING THE PLATE. THE PLATE SLIPPED HITTING INJURED EE'S LEFT HAND, TIPS OF THE MIDDLE AND RING FINGERS.