The Apex Bits-Torque 440-1-ACR1-DX Hex Insert Bit is a precision-engineered tool designed for accurate torque applications. With a hexagonal-shaped end, it ensures a secure fit into corresponding hexagonal recesses in screws or bolts, minimizing slippage and stripping. The "440" series designation denotes its high-quality construction within the Apex Bits-Torque product line. The alphanumeric code "1-ACR1-DX" likely specifies its size, coating, and additional features, ensuring durability and reliability in various industrial or mechanical settings.