PFERD Universal line PSF flat die grinder cut-off wheel for use on die grinders. Ideal for working in hard-to-reach areas or close quarters. Applications: Cutting of sheet metal, sections and solid material. Recommendations for use Thin cut-off wheels (.035") provide fast and convenient cutting with minimized burr formation. Fully reinforced for use in hand-held cut-off work. Ideal for working in hard-to-reach areas or close quarters. Specification: Diameter (inches): 3; Thickness nominal (inches): .035; Thickness metric (mm): 0.9; Bore (inches): 3/8; Maximum Rotational Speed (RPM): 25000; Type: Type 1; Grit size: 60; Abrasive: Aluminum Oxide A; ; .