Scotch-Brite(TM) SF Finishing and Deburring Wheel, 12 in x 2 in x 5 in 8S FIN, 1 per case SF Wheel is designed for Finishing applications, where EX2 and EX3 do not provide satisfactory finishes. SF Wheels are a convolute construction with high densities 8 and 11. SF wheels are available in 2 grades: MED and FN. SF Wheels provide a fast cutting product. SF wheel is smooth running, less fatiguing for operators. Mineral coated technolgy allows the SF wheel to contain more mineral.