The New LINE10 Tools discs are easy to install and remove by hand. They self-tighten with normal grinder rotation and only need to be snugged up by hand thanks to the 5/8-11 Thread on the arbor, which is standard on almost all Angle grinders made for the North American market. The Best part is that it will Not get loose as the normal rotation will keep it tight! Check it out here 👉 https://link.line10tools.com/grinderf... Product Features: The felt buffing wheel is made of compressed natural fine wool fiber to produce a densely firm buffing wheel ideal for buffing and polishing metal surfaces Easy, quick, and tool-free disc changes. Thanks to the integrated 5/8-11" threaded arbor on each disc, it will thread on and off your angle grinder with ease. The best part is that the grinder's normal rotation will keep the disc tight! Each disc is fitted on a hardened thick plastic backing with a hollowed-out design that allows airflow for great heat dissipation and high shatter resistance while maintaining a cooler operation, unlike traditional Type 27 center depressed wheels, which are usually thin fiberglass and can shatter during operation. Universal 4-1/2 inch diameter discs with arbor threading that fits most common North American Angle Grinders, Ideal for metal fabrication shops and autobody workshops. Suitable for grinding, deburring, sanding, polishing, and finishing most metals