MPA Standard High Efficiency Grinding Wheel，Grind and shape metals quickly and efficiently which is great for use with various materials. The MPA test is a quality assurance tool that ensures cut-off wheels comply with the EN12413 standard. MPA testing is performed by independent laboratories that are accredited to perform safety testing on cut-off discs. The test covers all aspects of disc quality, including tensile strength, chemical composition, dimensional stability, impact resistance and more.MPA Standard High Efficiency Grinding Wheel，your best choice