This handle on my milling machine that's spring loaded. They're usually used to lock things in place to keep from moving. You can pull it and rotate the handle to the desired position and it locks in place. I'm sure Amazon has these, but I just don't know what they're called.
>>2848490Table lock bolt handle?
>>2848490Locking levershttps://www.mcmaster.com/products/locking-levers/
>>2848490Gib levers. The lever connects with a fragment of metal in the slide called a 'gib' that jams the slide.