THIS IS A 3" FEMALE CAM AND GROOVE(CAMLOCK) FITTING X HOSE SHANK(PART C) ALUMINUM. IT IS MAINLY USED ON TRASH(MUDHOG) PUMPS AND ON TANKER TRUCKS. THIS FITTING MAKE THE CONNECTION AND REMOVAL OF HOSES QIUCK AND EASY. THIS IS A FITTING THAT EVERY SHOP MUST HAVE.