The ICSN-433 Shim Seat is a precision replacement insert seat engineered for indexable turning and boring toolholders that use 80° diamond (CNMG-style) carbide inserts. It provides a hardened, wear-resistant seating surface that ensures accurate insert positioning, improves cutting stability, and helps protect the toolholder pocket from premature wear. Designed for dependable performance in demanding machining applications, the ICSN-433 is manufactured to industry-standard dimensions with a 1/2" inscribed circle (IC), 3/16" thickness, and 3/64" corner radius. It is compatible with a wide range of external turning and internal boring toolholders and is commonly sold in packs of 10 for production and maintenance environments