Additional types of banana plug include:
Banana Plug Covers
Banana plug covers, also known as shrouds, are tubes that surround and protect the prong. They are automatically retracted when the plug is inserted into a socket. Sockets may also include shrouding. Banana plug covers are used for higher voltage equipment such as those used in test labs.
Locking Banana Plugs
These plugs include a mechanism that causes the prong to expand further than the standard spring-mounted fin after insertion into a socket, creating a very strong hold. They are a good choice if you need to ensure that cables will not come loose or be pulled out of the attached equipment accidentally.
Double Banana Plugs
Dual or double banana plugs consist of two plugs in a single housing, which may also feature a different type of cabling connector on the other side. This allows the creation of a sturdy connection to or from two separate audio cables.
Angled Banana Plugs
These specialist banana plugs feature a pin at a 90-degree angle to the cable. This allows them to be inserted top-down, providing a stronger, more secure connection than that provided by side insertion. The latter can be weakened by wire stress and accidental tugs. They are typically used with multimeters and similar test equipment.