Binding Post Finish Plain Material 18-8 Stainless Steel Barrel Head Style Truss Barrel Drive Type Tamper-Resistant Torx Thread Size 1/2 In.-13 Barrel Length 1/2 in Barrel Diameter 5/8 in Barrel Thread Depth 5/16 in Barrel Head Diameter 1 in Barrel Head Height 5/16 in Grip Size 1 in Made in North America Yes Material Quality Standards ASTM A582 Pack Size Small