Good material The folding boat anchor is made of stainless steel 316 material, which can stand in harsh environment. It is casted by investment casting , very strong and durable. Electronic polishing The folding anchor is electronic polished , not mirror polished. But it is still very beautiful surface, make your boat look modern This folding anchor has 0.7 1.5 2.5 3.2 kg available. a premier manufacturer of stainless steel general marine and rigging hardware like boat anchors, cleats, deck fillers, hinges, shackles , turnbuckles, ect.. Contact with us to get our catalog for your reference .