Gerrardasnails:Big Chris:QED do a 'Screwloc' banana too, but they're not cheap. Around £15 a pair. As Dave said, the cable goes in the end and a grub screw or two clamp the cable in place. Nothing more specialist than a pair of wire cutters and a small screwdriver required.
There are plenty of cheaper options that are the same screwloc mechanism. Check out ebay, you could get 16 banana plugs for a tenner.
Indeed. But the QED ones cost more, so they've got to be better!
;-)