Ultra-fit spurs with the Balkenhol system. Hammer spur, 20mm long. Can be easily adjusted to the shape of the foot by slightly bending the spur. The Balkenhol system offers a unique fit and design. The spur straps are threaded through the spur at a 45-degree angle. A special recess on the inside of the attachment eliminates pressure on the rider's ankle and foot, ensuring the spur stays securely in place.