The 4mm aperture securely holds a 4mm banana plug in place, or the 4mm cross hole allows for bare audio /speaker wire to be securely locked in place.
2x Brass Gold Plated Right Angled Banana Plugs 4mm PREMIUM QUALITY Amp Speaker
HDSupply High Speed HDMI Cable with Ethernet HDMI A Male (19-Pin) to HDMI A Male 19-Pin 2x Shielded Gold-Plated Contacts
Audio Lead 3.5Mm Stereo Plug To 2X Rca Plugs Gold Plated 2M
???? 2x Optronics CAT5E RJ45 TOOL FREE KEYSTONE JACK Gold Plated CAT5E+JACKTJ/S
2x DVI-I MALE TO HDMI FEMALE ADAPTER CONNECTOR CONVERTER Gold Plated (24+5)
2x Phono RCA Splitter Gold Plated Y Adaptor 1 Male Plug to 2 Female Sockets
