? EASY to USE: Threaded nuts have an external thread and a hexagon socket drive and are screwed in with a hex key. ? EASY INSTALLATION: These hex socket screw insert nuts are advantageous over cylindrical nuts and T-nuts because they can be installed from one side of the room. ? CONVENIENT TO USE: The pre-drilled hole should be as deep as the length of the insert nut plus any part of the bolt that can be threaded past the end of the nut into the workpiece. br>? PREMIUM QUALITY MATERIAL: These insert nuts are made from zinc alloy in large quantity and come in a resealable clear plastic box. ? 6 DIFFERENT SIZES: This set of screw nuts comes in different sizes and takes different sizes of screws. (M4 * 10mm, M5 * 10mm, M6 * 10mm, M6 * 15mm, M8 * 20mm, M10 * 25mm) Description: A insert nut provides a threaded socket for a wooden workpiece, similar to a wall anchor. These insert nuts are inserted into a pre-drilled hole by screwing, in which case the external protrusions bite into the