This set includes five multi-purpose wheels from the brand PORTER-CABLE. The package includes two cutting and two grinding wheels, along with one additional wheel. The item diameter is 8 inches, and the wheel diameter is 4.5 inches. The sanding grade is coarse, and the set is made of metal materials. This multi-wheel set is perfect for grinding and sanding applications, and can be used with power tools and air tools. The item weight is 4-1/2" x 1/4" x 7/8". The PORTER-CABLE PC905135PK set is an ideal choice for those in need of versatile and durable grinding and cutting wheels.