Nailheads - Spots - Studs - 100 pcs 13mm Triangle Nailheads - Nickel - Premium Quality Brass Nailheads Made in the USA! Highest Quality: Nailheads are made of Brass (Not Steel). Our Nailheads / Studs are safe for clothing, will not rust. (Beware of cheaper imported steel spots which can rust and ruin your clothing). Easily set by hand on fabrics using a spoon or other handtool. 100 Triangle Nailheads. Size: 13mm Triangle Nailheads. 4 Prongs. Prongs are 3MM long. Color: Nickel