Whistle - Stag Antler Horn with Keyring, Chain or Lanyard Fixing Loop Stag Horn Whistle A unique, handcrafted single pitch whistle The unique quality of this whistle ensures that no two whistle have the same pitch or sound. Perfect if you have more than one dog or walk your dog in a popular doggy area. Measuring 9cm with predrilled hole for attaching keyring or lanyard.