The NTK14L Kit is used mainly in drywall applications, but can also be used in solid walls. It is suggested that the smallest hole be used to enable a secure fit. In hollow walls the wings will splay out to provide a more secure installation and a higher pull-out load. To finish installation, use a drywall or sheet metal screw to mount the item to the substrate. These anchors are not recommended for use overhead or applications where holding values are critical.