Check the listing for details. Vintage Fluidmaster Spud Wrench. Condition: Used. Listed at 4.99 USD. The Vintage Fluidmaster Spud Wrench is a collectible tool from the plumbing and steam fitting industry. Made by the brand Fluidmaster, this wrench is a unique and rare piece that would be a valuable addition to any collection. With its nostalgic design and historical significance, this spud wrench is sure to appeal to enthusiasts of vintage tools and plumbing memorabilia.