100 pieces Half Inch (12 MM) Round Cone-shaped Studs; 2-Prong; Steel, with superior bright nickel finish; Highest Quality, Heavy Duty Solid Steel, MADE IN USA; Fit standard dies, or are easily set by hand on leather and fabrics: cut small slit, insert prongs and bend over; Great for biker or punk gear, belts, leather jackets and wristbands, dog collars, bike ornaments, etc.