【Universal】This Adjustable Leveling Feet uses the most common 5/16" thread in the U S,it is not metric threads, such as M4,M6,M8,M10, nor 1/4 or 3/8. Please purchase after determining the thread parameters you need. 【Note】This product is recommended for indoor or outdoor furniture with the leg diameter greater than 1.2", such as coffee table,bar stool,,wine rack,bookshelf,balcony chair,patio table.If less than this size, there is a risk of cracking during installation. 【Function】Avoid direct contact between the furniture legs and the ground, protect the floor, tile or carpet from damage. The height of the four furniture legs can also be adjusted according to needs, the adjustment range is between 0.4"to 1". 【Install】 You need to drill a hole with a diameter of 11mm and a depth greater than 25mm on the furniture leg with an electric drill, then use a hex wrench or electric driver to screw in the furniture hardware, and install the leveling feet. 【Service】Our company has provided services for various furniture brands for a long time, the product quality is credible. If you have any questions, please send an email, we will reply and deal with it within 24 hours. 5/16 Adjustable Table/Chair/Furniture Leveling Feet Screw on