The ICSN-533 Shim Seat is a precision replacement component designed for indexable turning and boring toolholders using 80° diamond (CNMG-style) carbide inserts. It provides a stable seating surface that protects the toolholder from wear while ensuring accurate insert positioning for consistent cutting performance. Manufactured to precise dimensional standards, the ICSN-533 features a 3/8" inscribed circle, 3/16" thickness, and 3/64" corner radius, making it ideal for maintaining tool life and machining accuracy in demanding metalworking applications. Compatible with a variety of boring bars and turning toolholders.