These neat little equipment arms bolt on to your existing Jaspers keyboard stand so you can, uh, stand more keyboards. In my case I'm actually using them for a variety of other kit, like some of the heftier old drum machines, an Akai sampler or two, and the like; so I've got four pairs of these spanning one tier of a multi-tier stand. They work very well and the friction grips can be entirely opened, allowing you to attach them to the stand without disassembling it (which is a relief). Not exactly exciting, but very handy, and the build quality is excellent.