Hard to find and should function just fine!

Worked and fit as designed

Clips were too small for a standard 1/4-inch shaft.

The knob springs were as described and at a fantastic price. Unfortunately they did not fit my range top knob shafts as when I took a closer look, the shafts we're not 1/2 circles but more like 2/3 circles. So the springs would not work in that situation. But ..... I'll use them somewhere else in the house! Again, thanks for a great price, good product and quick shipping. Maybe Antique Electric Supply has others. Will have to check.

Just what i needed to make genaric wooden knobs work on my antique radio.

These are common devices for old knob designs. Originals do fail and these are great parts to keep in inventory if you work on older gear.

My Coronado was ailing. The turned wooden knobs and band selector lever for PB, AM1 and AM2 were there, but the "D" inserts were gone and one of the knobs had a massive wowed out hole where the clip went, and another clip was just gone. I took some wax paper, some Vaseline and an old D shaft pot, and prepared a batch of epoxy to fill the hole. I greased up the D shaft wrapped it in wax paper and dumped epoxy into the hole on the knob. Then I slid the clip over the wax paper and stuck the pot into the knob and shimmed it so the knob was straight. I have repeated the process dozens of times by now and these clips are how you save those old knobs. New we have resin and molds, and 3D printers, so most knobs can be replicated. The 3D printed stuff varies in quality, but the D clips assure a good fit, no matter what!