Imperial Angled Single Open Socket Wrenches Imperial Angled Single Open Socket Wrenches are tools used for tightening or loosening nuts and bolts with imperial (inch) measurements. They feature an angled or offset handle with a single open-end socket. The angled or offset handle design allows for improved access to nuts and bolts in tight or hard-to-reach spaces. It provides better leverage and makes it easier to apply torque when using the wrench. The single open-end socket means that only one end of the wrench has a socket, while the other end typically has a straight handle for grip