Designed for optimal performance, these backing pads from CGW Abrasives are crafted to accommodate 4 to 8-inch pads with internal 5/8-11 threads, ensuring compatibility and ease of use. The 1/4" foam construction strikes the perfect balance between medium stiffness and maximum grip, making them ideal for hook and loop discs. Whether you're working on welding projects or other abrasive tasks, these backing pads provide the reliability and durability needed for effective results. Each box contains one pad, making it a convenient addition to your toolkit for various applications in welding and gas essentials.