Benefits: - Superior Precise cutting - Long Wheel Life - Burr-Free Cutting of Ferrous Soft Hardness (Rc < 45) - No Material Alteration & Minimum Material Loss - Minimum Heat Generation This product should be used on a stationary cutting machine.040" x 1-1/4" Specification: A 90 - FSB Material Matching: Ferrous Soft Hardness (Rc < 45) At atto abrasives we create specialised abrasive Ultra-Thin Cutting Wheels for Metallurgical sectioning & testing. The reduced thickness and improved composition leading to no material alteration of these wheels makes them ideal for metallurgical testing.