If you've got wobbly furniture driving you crazy, these adjustable feet are the solution! The 20-set pack gives you plenty for multiple pieces - I've stabilized my kitchen table, a bookshelf, and still have leftovers. The 3/8-16 thread is standard for lots of furniture, and the carbon steel construction feels substantial - each foot supports up to 220 pounds without issues. The height adjustment is smooth and precise, perfect for dealing with uneven floors that make furniture rock back and forth. Installation is straightforward - either screw directly into existing threads or drill a 5/16 inch hole and use the included T-nuts for universal application. The felt pads are a nice touch - they protect floors from scratches and reduce noise when moving furniture. The black finish looks clean and discreet on most furniture styles. If you're tired of shimming tables with coasters or dealing with that annoying wobble every time you write or eat, these leveling feet provide a permanent, professional-looking solution. Much better than the plastic caps that come on cheap furniture. The quality is solid - these aren't flimsy components that'll strip or break under normal use.