Wiha Hex Key: 0 Ball Ends, 5/16 In Tip Size, Sae, Long, Alloy Steel, Black Oxide, 4 In Handle Lg

These T-shaped insulated hex keys have an insulated T-handle and shaft to protect against electrical shock from live electrical circuits and are suitable for use near electrical components when tightening and loosening fasteners. The insulated handle also allows for a more secure grip when turning compared to a noninsulated handle. These T-shaped hex keys have one long arm with the drive tip at the end, and two short arms that form a T-handle that can provide more torque than an L-shaped key.