Review on HanKun Heavy-Duty Furniture Leveler Tee Nut Kit - 3/8-16 Inch Thread Size - Adjustable Furniture Legs for Cabinets or Tables - Set of 4 - Height-Adjustable Furniture Levelers by Ryan Richards

They are definitely well made and more than enough for the way I intend to use them. The description said lock nuts and bolts were included with the order but none were included. Luckily I had the right nuts and bolts on hand. In addition, the plastic on the foot is described as non-slip and rubbery. No and no. They're made of hard plastic that won't slip. They slip easily even on the slick concrete floor of my garage. To prevent this, I'm going to put a piece of cut bike inner tube under each leg. Maybe good for a hardwood kitchen floor, but only if you want a chair or table that's easy to move. They are fine on carpet. The threaded flange (very strong and well made) requires a 1/2 inch hole for insertion. With a lock nut (which you should provide), the adjustment range is about 3/4" or a little more (I haven't measured it, but it seems correct). Edit: I saw another question somewhere about removing the threaded part and can be replaced with a longer one. No, the threaded part is an integral part of the brace and cannot be removed as usual. You can cut it off if you wish, but then you will have to drill and cut a leg to insert another threaded section. I don't even think it will work well.