The 3M 66518 Cubitron Cut Off Wheels are high-quality cutting tools designed for precision and efficiency. With a wheel thickness of 0.035 inches, these cut off wheels offer durability and compatibility with a variety of cutting applications. The old part number 01994 indicates that these products have a proven track record of performance, making them a reliable choice for professionals in various industries. With 5 pieces included in the set, the 3M 66518 Cubitron Cut Off Wheels provide a convenient and versatile solution for your cutting needs.