The Diago Patchfactory allows you to build custom length patch cables, without additional tools or specialist skills. Anybody can build a flawless cable. Strong, reliable connections. Other solderless cable designs suffer from poor reliability for two reasons: 1. Other screw-on caps use a coarse imperial thread. We calculated that by using fine metric thread instead, the same amount of force will tighten the cap more. 2. Finger-tightening, even with a knurled cap is simply not sufficient to make a reliable cable. We have machined a coin slot into each of our caps, allowing you to apply several times more force, resulting in a tighter fit. Using a coin means you can assemble a reliable cable without any additional tools wherever you are. Better still, the slot will fit almost all international coins. We don't recommend using plectrums - even the thickest ones just don't have the rigidity of a metal coin.