Your reliable partner for equestrian, dog sport, and boat fittings Herm. Sprenger from Iserlohn, Germany, is one of the leading manufacturers of metal products for equestrian, dog sport, and boat fittings since 1872. We produce boat fittings like pulleys and cam cleats, collars for dog sport and bits and stirrups for equestrian. Professional athletes successfully use our high-grade products. Since our foundation, we have been known for our high quality, our constant striving for innovation, and friendly relationships with our customers; we have now grown into an internationally successful family-run company with over 160 employees.