Unnecessary nicks in armored cable wire insulation cause rework, call-backs and possible arc-faults. The Sir Nickless Armored Cable Cutter protects armored cable wires. By drawing wires down, creating an air space above the wires, providing room for the cutting blade to shear through and sever the armored casing without nicking the wires within.. <a href="https://www.homedepot.com/c/best_electrical_tools_for_your_electrical_projects_HT_BG_EL" target="_blank" style="color:#F96302;">Click Here to See which Electrical Tools you should Use for your Project</a>. Handle knob stores up to six replacement blades. Handles all common BX, MCAP, MC and flex cables. Blade cuts armor without damage to internal conductors. Splices cleanly through casing with only a few turns