THESE LOUD STRONG CAT BELLS ARE A HIGH QUALITY BELL, NOT THE CHEAP TINNY TYPE OFTEN SOLD AS CAT BELLS. THEY ARE SUPPLIED WITH A SPLIT RING TO ATTACH THEM TO THE COLLAR, THEY ARE GREAT FOR SAVING WILDLIFE FROM CATS AND ALSO USEFUL FOR YOUR DOGS COLLAR TO ALERT SUNBATHING SNAKES OF YOUR DOGS APROACH, ALSO LETS YOU KNOW WHERE YOUR DOG IS IN LONG GRASS ETC.