Although it was not the original purpose, I used it for the work of the vacuum tube radio. Because the shaft length is different from the parts that can be arranged, this sleeve is used to joint the shaft. This has revived the vacuum tube radio over 60 years ago.
It may be too thick when used in a gap. Since there are three screws, there are cases where it can not be used in a narrow angular position. Other than that, it is convenient because you can easily fix the wire rope without a special tool. Depending on the ingenuity, it can be used for various purposes.