Our proprietary locking collars are arguably the safest and most secure way to not only strengthen your fabrication project but also provide limitless mounting methods.
Protected by Patent US6908107 and used in all our cage systems, our locking collars are the foundation for our Ultimate Sports Cage upgrade. Magazine editors, trail guides, wheelers from across the world, and even competitors have turned to our bolt-in cage for over a decade for their own vehicles. The strength our collars provide is inherent in how they couple our cage components together.
![Rock Hard 4x4™ Fabrication Collar 1.5 inch ID [RH-1150]](https://res.cloudinary.com/dyx4yhvoq/image/fetch/w_400,h_400,c_limit,f_auto,q_auto/https://www.rockhard4x4.com/v/vspfiles/photos/RH-1150-2.jpg "Rock Hard 4x4™ Fabrication Collar 1.5 inch ID [RH-1150]")
![Rock Hard 4x4™ Fabrication Collar 1.75 inch ID [RH-1175]](https://res.cloudinary.com/dyx4yhvoq/image/fetch/w_400,h_400,c_limit,f_auto,q_auto/https://www.rockhard4x4.com/v/vspfiles/photos/RH-1175-2.jpg "Rock Hard 4x4™ Fabrication Collar 1.75 inch ID [RH-1175]")
![Rock Hard 4x4™ Fabrication Collar 2 inch ID [RH-1200]](https://res.cloudinary.com/dyx4yhvoq/image/fetch/w_400,h_400,c_limit,f_auto,q_auto/https://www.rockhard4x4.com/v/vspfiles/photos/RH-1200-2.jpg "Rock Hard 4x4™ Fabrication Collar 2 inch ID [RH-1200]")
![Rock Hard 4x4™ Fabrication Collar 2.25 inch ID [RH-1225]](https://res.cloudinary.com/dyx4yhvoq/image/fetch/w_400,h_400,c_limit,f_auto,q_auto/https://www.rockhard4x4.com/v/vspfiles/photos/RH-1225-2.jpg "Rock Hard 4x4™ Fabrication Collar 2.25 inch ID [RH-1225]")
![Rock Hard 4x4™ Fabrication Collar 3 inch ID [RH-1300]](https://res.cloudinary.com/dyx4yhvoq/image/fetch/w_400,h_400,c_limit,f_auto,q_auto/https://www.rockhard4x4.com/v/vspfiles/photos/RH-1300-2.jpg "Rock Hard 4x4™ Fabrication Collar 3 inch ID [RH-1300]")