Six-Step Faucet Seat Wrench is used to remove and replace faucet compression seats. Made of hardened steel. 2-sided wrench sizing to fit most faucet compression seats. BrassCraft provides a complete line of quality professional plumbing tools at a competitive price. All products have been reviewed and tested by a third party testing lab. In addition, BrassCraft's internal testing facilities have inspected and tested all products in the program for durability, function ability and product longevity.