Seller: mkna_design_group (11,400) 100%, Location: Ogdensburg, New Jersey, Ships to: US & many other countries, Item: 201716965974 Color: Gold, Material: Brass, Details: Vintage Heavy Brass Screw Bolt Unusual BIG 4.5" Hardware Fitted Parts Antique. These came from a very old NJ house, the house itself was over 200 years old. I have no idea what these screws or bolts are for, they are just unusual. The angled piece fits into the T-shaped piece. Each piece weighs half a pound, and diameter of each screw/bolt is 1/2", which is unusually thick. Mystery part, best offer takes them.