Overview: These banana jack female works well because they could be fully disassembled. The screw connection is solid and helped the connection both internally and externally. How you assemble them will depend on your speaker system. The banana plug jacks are easy to grip , and can be plugged in and unplugged multiple times . These posts are well-built, and can be tightened down with multiple screws and locking washers for a secure fit. Soldering is not needed, you could just was well pinch the wires between the nuts. Plenty of hardware to satisfy your needs when it comes to binding posts for speakers, or your binding post project's needs. Friendly Noted: Be careful not to overtighten! Specification: Black and red color coded Plugged in and unplugged Gold plated and eco-plastic Screws locking and no soldering Dual female banana socket plug Fully disassembled and easy to install Easy to install speaker terminals Approx 5mm max panel thickness Fit a standard double banana plug (3/4" spacing) Package contents: 4Pcs Banana Jack Binding Posts