The Kennametal 3/8" Inscribed Circle Square Boring Bar Shim 1/8" Thick ISSN Shim Style Negative Rake, part number 1016652, is engineered to enhance the performance and longevity of indexable boring bars. This shim is specifically designed for use with square boring bars featuring a 3/8" inscribed circle, providing a precise fit that ensures optimal tool stability and cutting accuracy. Constructed from high-quality materials, the shim offers exceptional wear resistance, effectively reducing the frequency of tool replacements and minimizing downtime in machining operations. Its 1/8" thickness contributes to the overall rigidity of the boring bar assembly, allowing for more aggressive cutting parameters without compromising tool integrity. The negative rake design of the shim facilitates improved chip control and surface finish, which is particularly beneficial in applications involving hard-to-machine materials. By incorporating this shim into your tooling setup, you can achieve consistent machining results, extend tool life, and enhance overall operational efficiency.