RJ45 Pass Through Connector Compatibility - The heavy-duty RJ45 Crimper tool is designed to work with RJ45 8P8C Ethernet connectors;crimp RJ45 cat6 cat6a cat5 cat5e Ethernet connectors and trim the extra wires clean while crimping. Professional Die-cast Die Sets - The gold-plated mental pins can be accurately crimped and pierced the wire insulation to fix the wire into the RJ45 connector; ensure that the extra wires can be cut completed and have a strong modular connection. On-tool Wiring Guide - The RJ45 crimp tool is designed with a wiring colour code; allowing you to get the correct color wires order quickly and conveniently while crimping; minimize the bad termination. Ergonomic Grip and Replaceable Blade - You can hold it tightly for enhanced the precision of crimping and reduced fatiguing grip when crimping for a long period.Also,it comes with two replacement blades. You can replace the blade with a new one in case it becomes blunt over time. Customer Service - If you aren't thrilled with this RJ45 crimper or have any questions or problems, just let us know, we will reach out to you soon and make it right.