Concentric Circle Nailhead, Size 20, Solid Brass, Nickel Finish, 500 pieces per pack Brass Made in US 500 pieces per pack Heavy duty solid brass construction provides the highest quality finish Sharp prongs pierce most materials and curl over for the most comfortable fastening Made in the USA by C & C Metal Products Prong Length = 0.102 In., Assembled Height = 0.046 In., Diameter = 0.215 In