Excellent Lifetime - The X-LOCK X571 Best for Metal Flap Disc offers an excellent lifetime on metal applications. Its high-quality zirconia alumina/semi-friable aluminium oxide grit is tough and wear-resistant for extensive metalwork. The disc's carrier plate is available in angled and straight versions, manufactured from fibreglass material. Changing flap discs is fast and convenient thanks to the keyless X-LOCK system. Click it on with X-LOCK – the fastest accessory-changing system on the market. Also fits nut and thread angle grinders. Features and Benefits • Long Life • X-LOCK X571 Best for Metal Flap Disc offers an excellent lifetime on metal applications • High-quality zirconia alumina/semi-friable aluminium oxide grit is tough and wear-resistant for extensive metalwork Specifications Disc diameter: 125mm Bore diameter: 22,23mm Bore size: 22,23mm Grit: 120