I bought to replace the larger right-angled jacks on my pedal board. These seem OK for the task. The pancake section is 34 mm long (shorter than most right angled jacks), and just 12 mm thick above the base of the jack shaft, which makes then just 2 or 3 mm thinner than the right angled jacks I was using before. It might not seem like much but it does count and does help on a crowded pedal board. However, there are problems...
1) The pancake section is 20 mm wide and therefore protrudes 10 mm from the centre line of the jack plug itself. That means that you cannot use two of these side-by-side unless both sockets you plug into are at least 20 mm apart. Alas, the stereo inputs on my TC Electronics pedals (reverb and delay) are 17 mm apart centre-to-centre so I can't use these jacks at those pedals in stereo.
2) The product description says it will accept 4 mm - 6.7 mm cables but my 5 mm cables did not grip and even an unsoldered 6mm cable pulled out with little difficulty. I used heat shrink to add a little extra thickness but even If these were not being used on a pedal board, I'd be unhappy with anything less than 6 mm cable.
Aside from that these seem otherwise good and are easy to solder (if your solder and wire prep skills are neat). Strip 10 mm of insulation, push back and twist the shield, strip 5mm insulation off the core wire, tin the wires, trim the sheild to 5mm and solder away. If you need heat shrink to add a little extra diameter, use 15 - 20 mm length.
Update: I had high frequency tone loss with a cable, got a negative capacitance reading (which is of course nonsense) with a cable and traced it to a partial short (150kΩ between tip and sleeve) from in one of these jacks. Having tested more of them I found the same issue. I have since replaced them all with a solderless jack set, which is not without its share of issues either but better quality overall.
