Cylindrical shape gives a sleek appearance to adjustable shelves.Specifications: Bore Diameter=5 mm, Finish=NICKEL, Material=STEELSpecifications: Overall Length=5/8 in, Pin Length=5/16 inCylindrical shape gives a sleek appearance to adjustable shelves. Fit into equally spaced holes on bookcase or cabinet sides to produce adjustable shelf supports:Steel pins with Nickel plated finish for durability.Straight cylindrical shape is always aligned to shelf surface.5mm diameter pins require a minimum 3/8" deep bore.Imported.