When you will need furniture legs attachment mounting plate: When the attachment points on furniture are damaged or threaded nut is missing, T-Nut become loose or cannot be installed, your furniture becomes so weak and wobbly. our attachment mounting plates can help repair and strengthen your furniture by simply attaching them over the existing hole in the frame. It can convert furniture hole from M10 to U.S. standard M8 holes: Some European imported furniture (Ikea, Natuzzi, etc.) pre-drilled sofa legs with M10(10mm) wide bolt, while U.S. standard is 5/16" (Known as M8) wide bolt. Using a set of T-Plates centered over the existing hole in your furniture and you can adapt your furniture to accept M8 hanger bolts. Notice: Please look at the specifications of the flat mounting T-plate set carefully before you purchase, and choose the one you really need, in case you buy a wrong size that cannot fit your furniture.