Professional Combo RJ45 Crimp Toolkit: Ethernet crimp tool kit includes 1 x RJ45 Crimp Tool Passthrough, 2 x Replacement Blades, 20 x CAT6 Pass Through Connectors, 20 x Connector Covers, 100 x 6 Inch Nylon Cable Ties, 1 x Mini Wire Stripper Punchdown Tool, 1 x RJ45 Network Cable Tester (9V Battery Not Included) and 1 x User Manual All-In-One RJ45 Crimping Tool: Wire stripping, crimping, and cutting tool for paired-conductor data cables. Ideal for crimping 8 position modular plugs such as CAT5e, CAT6 and CAT6a connectors(not AMP). On-tool wiring guide helps minimize wiring errors Wide Application: Modular crimp-connector installation tool for voice and data applications. Pass Through technology significantly reduces prep work time Mini Design: This cat6 crimper is about 2/3 size of the traditional rj45 passthrough crimpers. The compact design handles easily for an ergonomic grip and comfortable compressing action. Handle grips will not let you to be tired and prevent your hand from slip