These end-adjust tandem patio door rollers are designed to help restore smooth sliding performance on compatible patio doors. Built with a heavy-duty cold-rolled steel housing and nylon wheels, they provide reliable support for sliding door systems that use aluminum tracks. Key Features Heavy-Duty Construction: Cold-rolled steel case and carrier designed for durability and long-term use End-Adjust Design: Allows adjustment for improved door alignment and smoother operation Tandem Roller Setup: Dual-wheel configuration helps support stable, even sliding performance Nylon Wheels for Aluminum Tracks: Designed specifically for use with aluminum tracks to reduce wear and help extend track life Load Capacity: Supports doors up to approximately 150 lbs when two roller assemblies are used per door Standard Mounting Style: Recess dimensions and hole spacing follow common industry practice Replacement Patio Door Part: Suitable for replacing worn or damaged sliding patio door rollers What’s Included Patio door roller replacement assemblies Tandem nylon wheel rollers Installation Notes Mounts in the recess at the bottom of the door rail Verify recess dimensions and hole spacing before purchase Use nylon wheels only on aluminum tracks to help prevent track damage Additional Notes Designed for compatible sliding patio doors with aluminum tracks Tools may be required for installation and adjustment and are not included Check measurements and fitment before purchase