I expect that I simply times can quickly reconnect somewhere such test leads. - And out of the box. But that does not go with this most. If you try it slid almost always (laterally) away or turned. The first thing I noticed in this product, was the very pronounced odor. - Maybe softener or something of the kind. I suppose that it is also what the shells did so extremely slippery on the terminals. In addition, the terminals can be pressing very hard due to the strong spring pressure (would). Many of the metal grip surfaces of the terminals are slanted = not parallel to the opposite side. -> A strong pressure on an inclined plane with a slippery, smelly little leading to slipping. The hinges allow the terminals to be desired - too much play - too weak - especially compared to the spring pressure! When closing the terminal this reason, may times next to each other, rather than side to terminals. The cables themselves are pleasantly flexible and not too thin, but no viable terminals, brings little. This was previously the frustrierenste and ugliest experience that I've ever done with something like this. It is nevertheless conceivable that there would be no (or much less) conspicuous problems without this excess of plasticizer (?) / Without the excessive slipperiness. The (terminals of) test leads from other sources, which I had previously used are certainly not perfect, but these can be without problems and without frustration use - each clamp experiment a success - no slip-ups - no extreme pressure required. PS .: Optical cables look tidy, but the strands inside are very thin and have (therefore) an unexpectedly high electrical resistance. For high currents, they are not done! - If the high internal resistance would allow any high currents. ;-) So the pure cable are rubbish!