This Fly Reel Seat has Aluminum hoods and double lock nuts. The threads and hood are well fit together. They are machined from marine grade aluminum and anodized to prevent corrosion. It is made from one piece of walnut wood up locking Fly Reel Seat. It can be used for fresh water spinning rod by remove wood thread butt cap and also can be used for small spinning reels with sizes from 500 to 4000.