Arlington's new one-piece RETROFIT Snap²It® fittings are easy to use in an OLD or NEW WORK installation - and they handle the widest variety of cables! They are ideal for adding additional circuits to a load center. And you get the same labor-savings in a retrofit installation! Installation is quick and easy with NO TOOLS required. To install in an installed box, pull the cable/conduit through the knockout. Slip the fitting onto the cable, then snap the assembly into the box. That's it! Widest total cable ranges Our retrofit Snap²It ® connectors accommodate cables from 14/2 to 10/3. Widest variety of cables For AC, MC, HCF, MC continuous corrugated aluminum cable, MCI-A cables (steel and aluminum), AC90, ACG90 and FLEX. Super-secure installation No pullout! Fully assembled one-piece design with insulated throat.