Metal Expanding Shirt Collar Button Extender. Never worry about your shirt collar feeling too tight again. The Metal Expanding Shirt Collar Button Extender is a metal button attached to a expandable stainless steel spring loop. Place the button into the button hole of your dress shirt collar. Next, place the loop over the dress shirt collar button. Durable and made to last, this button extender makes dressing nice a comfortable experience. May also be used on dress shirt cuffs creating expansion at your wrists as well. Additional Details ------------------------------ Product description: Metal Expanding Shirt Collar Button Extender. Never worry about your shirt collar feeling too tight again. The Metal Expanding Shirt Collar Button Extender is a metal button attached to a expandable stainless steel spring loop. Place the button into the button hole of your dress shirt collar. Next, place the loop over the dress shirt collar button. Durable and made to last, this button extender makes dressing nice a comfortable experience. May also be used on dress shirt cuffs creating expansion at your wrists as well.