Need to fit a 20mm arbor saw blade onto a 1/2\ arbor machine? These brass bushings have you covered! This pack includes 8 high-precision brass adapter washers, each 1mm thick, that smoothly convert a 20mm hole down to a standard 1/2\ arbor size. They're easy to install—just slide the bushing into the blade's center hole, and you're ready to mount it on your saw. Made from durable brass, they resist wear and provide a secure, wobble-free fit. Perfect for table saws, miter saws, circular saws, and other woodworking tools. A must-have for DIYers, carpenters, and hobbyists who work with international or different-sized blades. Just remember: the bushing thickness should not exceed your saw blade's thickness. Keep these handy in your workshop for those 'blade doesn't fit' moments—they're small, affordable, and save the day!