Freud BL71MNA9 1-Inch to 20-Millimeter Saw Blade Bushing Go to amazon.com Related posts 10 best bushing 20mm for 2022 FeaturePrecision machined for best resultsEnables you to use larger bore blades on your sawCovered by Freud's limited lifetime warranty DescriptionFreud's bushings are manufactured to the highest precision to insure a cut equal to that of the Cutter without the Bushing.