Premium Quality Aluminum: Durable and lightweight, ensuring long-lasting use. Swaro-hub Compatibility: Fits perfectly with EL, ELR, and NL binocular models. Easy Integration: Seamlessly connects your Rick Young Bino Harness. Made in the USA: High-quality craftsmanship and materials. Reliable Performance: Ensures a secure and stable connection for optimal use. Replacement binocular connection hub, perfectly machined to fit EL, ELR and NL binos allowing for any aftermarket binocular harness the ability to connect to the Swaro spindle type application. Each order comes with 2 hubs. You will push out the stock keeper pins from your neck strap and use them to secure the RYO Swaro-hubs to your binoculars. If you own the small companion series binoculars these will not fit, check for our other verison in that case