110&66 Single Blade Punch-down Tool. This tool is designed for both 110 and 66 single-wire termination and can be easily switched between high and low impact settings. The low impact setting allows punching down 110 wiring blocks, modular connectors with IDC termination and 110 patch plugs and its high impact setting is used when seating connecting blocks onto wiring blocks. It comes with both blades stored in the handle. Includes both a 110 and 66 blade.