MAIN FUNCTION: Used for holding arm cover, slipcovers,upholstery or bed skirts in place,No more sliding and slipping. Great for slip covers, mattress pads, arm chair covers and more. SAFE AND CONVENIENT: Clear heads twist pins have rust resistant construction, secure to furniture without harming fabric, bring convenience to your life. LONG SERVICE LIFE: Hard,anti-impact and tough for maximum durability which allows for long service life. EASY TO USE: You just need to insert these metal pins into the upholstery without tearing or snagging, and they will grip firmly. ANTI-RUST: The is processed by special material, good-looking, and not easy to rust.