Expand length: 1540 mm (60.63 in) Spring outer diameter: 48 mm Material width: 8 mm Material thickness: 0.8 mm Mounting: inner hook and outer hook Function: chrome housed spring that returns the quill to the after drilling Finish: chemical blackening forms an oxide film, isolates air, and prevents rust Compatibility and applications: suitable for use as a replacement spring in vacuum cleaner coil springs, volume tube coil springs, safety springs, and other coilspring assemblies Use scenarios In drill equipment with a quill mechanism, this spring returns the quill to the after drilling to improve workflow and reduce manual reset. As a replacement spring in vacuum cleaner components, volume tube coil springs, or safety springs, restoring reliable action and durability in environments where corrosion resistance is beneficial. In other appliances or tools that require a chrome housed spring with both inner and outer hooks for mounting, providing a robust, longlasting force.