NortonĀ® GeminiĀ® 66243510630 Cut-Off Wheel, Type 1/41, Small Diameter Reinforced, ThinKerf, Outside Diameter: 4 Inch, Thickness: 0.035 Inch, Arbor Hole / Thread Size: 3/8 Inch A.H., Abrasive Type: Aluminum Oxide, Bond Type: Resin, Max Speed: 19100 Rpm, Mounting: Arbor, Product / Materials Abraded: Metal/Stainless Steel