Built for Pass Thru Connectors Fast, reliable modular-crimp connector installation for networking applications. Crimps RJ45 Cat 3/4/5/5e/6 (8x8) (8P8C) and works for EZ-RJ45 pass-thru connectors with built-in pass through blade. Compact Design Modular Crimper 2/3 the size of traditional crimpers, one hand operation with the compact size fits in any pocket, tool pouch and chest. Recoil Spring Loaded Mechanism Recoil spring design on the handle returns tool to ready position upon cycle completion, helps you save time and effort and makes the release easy after successfully crimp the modular plugs. High-carbon Steel Construction Crimping dies are precision ground from high-carbon steel with black-oxide finish for excellent performance and durability. Ergonomic grips make sure that you have a comfortable carry of the tool. Whats in the Package? Blister package includes 1x RJ45 Pass Through Crimper, 1x Mini Punch Down Cable Stripper and 3x Network Connectors for Test.