PREMIUM QUALITY: We designed this all-metal Tinkle Bell specifically with sound quality and durability in mind. The dog doorbell is manufactured with an iron support and brass bell. GET STARTED QUICK AND EASY: We include 2 screws and wall anchors that make installation a cinch. Ribbon type bells are difficult to accommodate to dogs of all sizes. You'll enjoy the benefit of customizing the location based on your dog's size (tall or short). CUSTOMER SATISFACTION: Purchase with confidence knowing that the Mighty Paw Tinkle bell is backed by a 100% money back satisfaction guarantee. Not Happy? Let us know and we'll refund every penny! SAFETY: Ribbon material and aluminum jingle bells can wear over time and allow for claws to catch. The all metal brass Tinkle Bell prevents this from occurring keeping your dog safe!