The Precision Brand 25106 Arbor Shim is a set of 10 steel shims with a thickness of 0.005 inches and a 3/8 inch inner diameter. These silver shims are designed for use in arbor presses and other metalworking applications, with a length of 4.000 inches and a width of 0.600 inches. Made in the United States by the trusted brand Precision Brand, these arbor shims offer precise and reliable performance in CNC machining and metalworking processes.