Product Name: Through Hole Network Tool Kit HIGH QUALITY:- Made of metal and plastic, it is certified durable for wire testing, short checking and open circuit locating without damaging the insulation. Wide range of applications: RJ11 RJ12, RJ45 CAT5/6e, 4P 6P 8P, CAT5e CAT6 modular plug crimping. Work line designed for scan and search capabilities of phone lines, alarm lines, computer lines, intercom lines, speaker lines, thermostat lines (network, phone, coax, inline, and even behind-the-wall cables) , is a common tool for wiring and installing networks on the market. Colour:black Material:Metal + Plastic Package Contents: 1 x Network Cable Tester 1 x Tracer Transmitter 1 x Tracer Receiver 1 x through hole crimping pliers 1 x Mini Wire Stripper 1 x crimping tool 2 x RJ45 Connector Extender 50 x RJ45 through-hole network headers 50 x RJ45 network plug case Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.