Yardley self-tapping inserts are ideally suited for high volume assembly operations because of their easy, quick installation. Inserting a self-tapping insert is as simple as driving a self-tapping screw or tapping a thread. A drilled hole of correct size must be provided, driver tool is applied to insert, driver and insert are positioned over the hole, insert is driven (turned) home and the driver is backed off, leaving the insert installed. The insert cuts its own threads as it is driven into the base material. http://www.hardwaco.com/threaded-inserts/self-tapping-threaded-inserts/