So it seems to work what it was designed for. Although the actual soldering with their help is hit and miss. The best use I have found is in straightening IC pins and bending LED pins. The use of tubes significantly reduces the load on the legs of microcircuits and LEDs. to fix an EPROM for which I had no replacement. So it's worth it. It's a mess. The pipes just won't stay in place. It might be easier to put them all in one bag.