1、Easy To Use: This crimper has a locking button design that works well to crimp the rj45 straight through connector while cutting off the excess wire. 2、Multifunctional: This connector can be used to test rj45 shielded connectors and unshielded connectors, rj11 connectors, and can be used to test the line status (e.g., open, short, crossover, etc.) of network wiring and telephone line cables, displaying the connection of 1, 2, 3, 4, 5, 6, 7, 8 and G of the 8P8C connection at the end of twisted pair cables, and clearly indicating to the user if there are any faulty circuits present. 3、50 Crystal Protective Covers: This adapter comes with 50 crystal head protective covers to protect these connectors from dust and water. 4、Mini Wire Stripper and Cutter: This connector comes with a mini wire stripper and cutters to quickly strip the outer jacket of network cables and neatly cut the wires. 5、Wide Crimping Range: This crimper has a wide crimping range for cat5 cat5e cat6 cat6A cables, large crimp rj45 shielded and unshielded straight through and standard connectors.