LOCKING METAL END? The female locking end has a rubber grommet. This allows the ends to snap into place without being loose. COLOR CODED? 6 colors of XLR connector, easier matching and controlling different microphones or DMX lights. CABLE FUNCTION? XLR connectors male and female is ideal for audio connections and connecting microphones and other recording equipment. PREMIUM MATERIAL? Made of Zinc alloy, ensures high conductivity and durability. Rubber shell for smooth surface without burrs and the noise can be well shielded. COMPACT DESIGN? Devinal Professional XLR Plugs , Compact design with sturdy diecast shell, fiberglass reinforced hard plastic insert and chuck type strain relief for secure clamping of all cables.