Ives 5BB1BSCHW 4.5 652 NRP Hinge Standard pin material are: Brass Hinge Steel Pin, Stainless Steel Hinge Stainless Steel Pin, Steel Hinge Steel Pin. 5-Knuckle Ball Bearing Hinge, Heavy Weight, 4-1/2", Beveled Swing Clear, Non-Removeable Pin, Satin Chrome