Dual material chassis fits comfortably in your hand. Trace wire paths and identify cables in common wiring systems. Includes RJ11 adapter to converrt tone generator to an alligator-clip configuration. Heavy-duty RJ11 jack on tone generator for long life and repeated connections. Replacement tips available (Cat. No. VDV999-059).~ Replacement alligator-clip adapter available (Cat. No. VDV999-067)