Diamond Head Acrylic Upholstery Tack, 15mm Brilliant and clear faceted stone glowing with hints of rainbow prisms, illumination and sparkle 15mm stone encased in polished nickel. box of 50 covers approximatey 3 linear feet. Affixded nail length is 1/2-inch made of solid steel Update your: dining room chairs, headboards, ottomans, sofas, all types of wood furniture, cornice boxes, walls, ceilings, picture frames, or where ever your imagination can take you Enhance your home and furnishings with sophisticated sparkle!