Leg Daddy 5/16" T-Plate Sofa Leg Attachment Plates, Set of 4 Designed for attaching sofa legs to new or damaged sofas, couches, love seats, and ottomans. 2" by 2" and are approx 1/4" deep. Plates have 5/16" threaded attachment holes for Hanger Bolts Ideal for attaching Leg Daddy Sofa Legs to your furniture. T-Plates are needed when attachment points on sofas are so damaged, the T-Nut cannot be installed If your sofa uses M10 (Metric 10mm) bolts, these plates allow you to use standard 5/16