The Klein LLM15 1.5 mm Long Arm Hex Key is designed for a precise fit in sockets, preventing slippage and stripping of the socket. This unit works well in versatile applications such as hard to reach spaces or high-torque situations. Users are provided with a tool designed from top-grade alloy steel with rust and corrosion resistant surfaces for added durability. The long side allows users to access hard-to-reach places. The short side is useful in higher torque situations and low clearances.