The IC56WT is a new remote wireless inductive coupler with super safe housing and extension clamp-on feature. Its tone transmitter is built into the handle, so there is no cord to create problems or danger. The IC56WT greatly increases safety and reliability in line tracing. In addition to having no cord with a transmitter hanging at the end of it, this unit incorporates A-Tronics-Europe latest plastic housing (Auto-Clamp). This design provides automatic positive seating of the coupler contacts, plus a unique technique for manipulating the jaws at the end of a lineman's hot-stick. The inside diameter of the jaws is 14.29cm.