Designed to fit over long binding posts, this Jonard Tools Ergonomic Can Wrench with Security Key Kit is the perfect tool for opening telephone box fasteners and tightening nuts on binding-post terminals. This tool features a hex shape on the exterior of the sockets that can be used with a wrench to maximize torque. The 7/8' diameter impact-resistant thermoplastic handle is ergonomically designed and color-coded orange. The total length is 7' with 1.25' deep sockets to fit over long binding posts. The included security key insert fits into 5/16 or 5/32' hex security screws, allowing you to loosen or tighten them with the can wrench.