Machinists, this is a specific left-hand turning tool holder from SHARS. It has a 1/2-inch by 4-inch shank that fits into most standard tool posts. It's designed for positive rake DCMT or DCGX style 55-degree diamond inserts (specifically sizes 32.51 and 32.52). The 'left hand' designation means it's intended for operations like facing from left to right or certain turning operations. It features a small screw lock (SDJC) mechanism for secure and precise insert clamping. Made from quality steel for rigidity and durability in the shop. If your lathe work calls for a left-hand positive rake holder for these common insert types, this is a solid, affordable choice. Check your machine's compatibility and insert inventory before ordering.