5 Pack, 3/8", FLX/BX Saddle Connector, Indoors Only, In A Dry Location, Used To Connect Flexible Metallic Conduit, AC, MC & Non-Metallic Sheathed Cable To A Steel Outlet Box Or Other Metal Enclosure, 3/8" Size Fits 1/2" Knock Out , Suitable For: #14-2 To The Largest Size Fit Table Non-Metallic Sheathed Cable, #14-2 With Ground Steel & Aluminum Armored Cable, 470" Diameter, 3/8" Steel Flexible Metal Conduit, Aluminum Continuous Corrugated Metal Clad Cable 0.510-0.620"Diameter, Aluminum Smooth Sheath Metal Clad Cable 0.410-0.500" Diameter, Aluminum Interlocked Metal Clad Cable 0.462-0548" Diameter, Steel Interlocked Metal Clad Cable 0.422-0552" Diameter.