【Size】Inch coarse thread, 1/4-20,12pcs.Product height is 1″(25mm), screw length is 0.75″(20mm), base diameter is 1″(25mm), thickness is 0.25″(5mm)-Look at the second picture in the main image. 【Function】In the case of uneven floor, adjusting feet allows furniture legs to adjust between 1/4″ and 3/4″ height, preventing furniture from shaking and also allows furniture to move easily, protects the floor from scratching, and supports more than 200 pounds per product. 【Install】Products need to be used with threaded inserts, such as 1/4 T-nuts, internal and external teeth, rivets, etc. Threaded inserts need to be drilled according to different conditions. 【Note】This product is recommended for indoor or outdoor wood furniture with the leg diameter greater than 1″, such as coffee table,dining chair,etc. If less than this size, there is a risk of cracking during installation.