【Long Lasting Discs】Our metal cutting disc is made of iridium-plated white corundum, so our cut-off wheel has 2 times the cutting life of a normal cutting wheel. These cutting discs are made by a special process of alumina abrasive to ensure extra toughness, sharpness, and durability. 【Great Performance】The ultra-thin design of 1/16" thickness cutting off wheels provides fast, precise, and clean cutting performance with minimal burrs and material waste. 【Versatile Applications】Tough abrasive cutting discs are ideal for super-fast, clean cutting in carbon steel, stainless steel, iron, copper, and all other ferrous metals. 【Perfect Size】The cutting wheels are suitable for most die grinders-compatible with all 3" die grinders and 3/8" arbor, operating speeds up to 25,000 RPM and 80M/S. 【Reliable Safety】 CORTOOL metal cutting discs comply with international standards and safety requirements such as EN 12413, ASM07. Please wear suitable protective equipment during the use of 3-inch cutting wheels and do not exceed the specified maximum speed.