The On-Stage QK2B Quick Release Adapter allows swift installation and switching of microphones on microphone stands. The adapter has two parts, one that screws to the stand, the other to the microphone clip, the two parts then connect/disconnect instantly upon contact. This push-button, quick-release device mounts onto standard microphone stands with 5/8"-27 threads.
I feel like every studio has a bucket of these forgotten in a corner somewhere. These quick releases are made by dozens of manufacturers and they are all incredibly mediocre at best and borderline dangerous at worst. On one hand, this little guy weighs a very respectable 2.8 oz (80g) and is under 3.5 (9 cm) even when adapted to take a 3/8 mic clip, all better than average for a quick release. On the other, it has approximately 3-4 degrees of rotational slop from the tolerances (so, decent but not perfect), and if the little button does not pop back out when you insert the cap, your mic is NOT secure! I have heard plenty of horror stories of people hastily slapping mics on these, rotating them upside down (e.g. for a vocalist), only to watch in horror as the mic takes a nose dive towards the floor. The build quality overall of the On-Stage variant is among the best of this design, with no visible burrs and decent tolerances, but I still would not recommend this design. It is far, far too easy to put the cap onto the receiver in such a way that the button is stuck down and does not properly secure the mic. You also cannot use these one-handed, you must press the button in before you can put the cap on, and same for the reverse. Overall, this is a very limited and basic design which is fine for use with durable microphones on a stage or the like (SM-57's can take a fall), or for home use to simplify reconfiguring a streaming/WFH setup, but I would not under any circumstances recommend using these with any fragile, valuable, or important microphone.
At last count I have 75-80 of these. I have 50 mic stands. They're invaluable, when you get used to using them you'll wonder how you ever managed without them. No more cross-threaded microphone clips, and putting away/swapping microphones is so much faster. Keeping the correct clips with the microphones is also much easier. I've even installed the posts on my stereo bars, so I can quickly pop a pair of mics on a stand.