These hanger bolts can be used to retrofit wooden sofa legs to fit standard 5/16-inch sockets or T-Nuts. The coarse wood threads screw into the wooden sofa leg, and the fine machine threads are standard 5/16-inch for easy installation into your furniture. These hanger bolts come as pictured, without any additional hardware or instructions. If purchased with sofa legs, they will be bagged separately in the package and you will need to install the bolts into the legs yourself. Prior to ordering, please ensure the sofa legs you will install these in have a minimum height of 1-1/2 inches of wood which the coarse wood screw can be threaded into.