This mounts are of an Eagle Displayed, which in heraldic terms means legs and wings spread open. This common heraldic device is still used by many countries such as Poland, Romania and even the United States. Eagles were valued for their ferocity and hunting skills, so adding them to your garb will surely make you a fierce warrior indeed!
Mounts like these would be inserted along the length of a belt to add decorative elements. A great place to learn about belt mounts and how they were used can be found at the Rijksmuseum.
