Optimize automated operations with the strength and versatility of metal belts PureSteel® endless metal belts are created by welding together two ends of a metal strip. High-energy beam-welding techniques, pioneered in the space program, form a high-integrity butt weld that is extremely strong and smooth. Endless Belts PureSteel® endless metal belts are created by welding together two ends of a metal strip. High-energy beam-welding techniques, pioneered in the space program, form a high-integrity butt weld that is extremely strong and smooth. More durable, clean and accurate than fabric, rubber or PVC belts, our PureSteel® endless metal belts help within a wide range of industries, and work well in the most demanding production operations and environments.