A 6"" C VIS GRIP CLAMP WAS BEING USED BY THE MAINTENANCE TEAM TO ASSIST IN THE REMOVAL OF THE GLASS SAND ELECTOR CONVEYOR BELT FRM THE BOTTOM OF THE SILO ELEVATOR. THE VISE CLAMP WAS ATTACH TO THE CONVEYOR INCLUDING A ROPE TO PULL THE BELT FROM THE ELEVATOR. THE VISA CLAMP PULLED LOOSE AND STUCK EE S RIGHT HAND, INJURING HIS FINGERS.