Tooth Keychain by I Heart Guts Let this adorable tooth keychain remind you to floss. Engraved back of keychain and display read: "Tooth: Flossin' Ain't Just For Gangstas" Sink your teeth into the fact-filled description on the back. Zinc alloy with soft enamel, tooth measures 1.86" x 1.5". I Heart Guts puts a smile on your face and smarts in your brain.