Sold as a set, you will get two key rings. Each is made from aircraft grade stainless steel cable with a barrel clasp. One with the signal flag "P" and one with the signal flag "S". Port & Starboard of course!! A great gift for those with a twin engine boat! Ask any yachtsman or Captain which flag is which and see if they get it correct! Need a hint? Blue with the white middle square is the letter "P" and white with the blue middle square is the letter "S". Twist the barrel clasp open & add your personal keys to the ring. You can add a float or cork too.....highly suggested because glass doesn't float, but it sure looks good!