I acquired this lot of screw type locks from an estate sale. Majority of them are made of brass, a few are aluminum. I was told the "star" locks are brass, t are 18 of them, and they came from the state of Texas, as did the 4 locks with the larger shackles, which appear to be steel, as they are magnetic. These are made by WRRS Co. and RACO. T are 9 wrrs co. brass locks, and 11 aluminum, and the balance is an assortment. 56 total. By what I have been able to find out with a search, the WRRS Co. is the Western Railroad Supply Co. Don't know anything about the RACO. T is a screw driver type key that came with this lot with the words SAFETRAN that will be included. A nice selection of different types of screw type locks. Most of these are in good shape, and it appears some were never put in service. Update: One Ebayer has asked, if they are any letters on the backs of these. The answer is no, only raco and wrrs co. letters.I accept usps money orders, cashier's check, and paypal ONLY!! No exceptions! Payment is expected( in my hand) within 7 days of auction end.... after that time, I have the right to relist! Domestic bidders only! No refunds or returns accepted on this particular item!