The Loxx Pull It Up Fastener 1/2" Self-Tapping Screw Stud is a complete lower section for cloth-to-surface installations of the Loxx Fastener System. Loxx fasteners secure automatically and lock tight until the button is pulled. This positive engagement is created by a stainless steel spring inside the upper head that fits around the ball head of the stud. The result is a fastener that won’t accidentally come undone but is still easy to operate.