A Double-clamp toolholder (typically ACLNL/R series) with a 95-degree approach angle, designed for negative 80-degree rhombic inserts (CN**0904 or CNMG/CNGA 33*), is a rigid external turning tool. It is engineered for heavy-duty roughing and finishing, featuring secure clamping with a top clamp and shim to maintain high accuracy and insert stability.