EE WAS USING A PIPE WRENCH TO RELEASE A FITTING FROM A MACHINE. THE FITTING RELEASED AND THE WRENCH HANDLE STRUCK EE OTHER HAND AND MASHED IT AGAINST THE EDGE OF A FLANGE. EE RIGHT RING FINGER TIP WAS SEVERELY MASHED CAUSING FRACTURE WITH A CONTUSION, SPLINT AND THREE SOUCHERS NEEDED EE WAS RETURNED TO FULL DUTY ON THE SAME SHIFT