The X571 Best for Metal is compatible with angle grinders. The X571 Best for Metal has an excellent lifetime when grinding welding seams and coarse sanding metal surfaces. Its high-quality zirconia alumina/semi-friable aluminium oxide grit is tough and wear-resistant for extensive metalwork. This product is intended for metal. The grit is bonded using fully synthetic resin for wear-resistance in heavy-duty applications on a backing material made of robust x-cloth for long-term use. The carrier plate is available in angled and straight, fibreglass and plastic versions.