The Central Tools OP122A is a replacement open‑end interchangeable torque wrench head designed for torque wrenches that accept SAE ‘A’‑size heads. Featuring a 3/8-inch open‑end jaw, this head allows precise torque application on 3/8" fasteners while maintaining compatibility with Central Tools’ interchangeable‑head torque wrench systems. It installs quickly, offering a durable, reliable solution for maintenance, automotive, and assembly environments requiring repeatable torque accuracy.