Double End hexagonal & Square Wrench: This 2 in 1 faucet seat wrench features both hexagonal and square ends, eliminating tool switching for easy installation / removal of faucet seats in tight under sink spaces Heavy Duty Carbon Steel Construction: Made from rust treated carbon steel that withstands most torques without bending or cracking, ideal for both home kitchen repairs and job site use Compact & Portable Design: Lightweight a whole piece construction fits easily in toolboxes, drawers or tool belts for quick access during plumbing repairs Clear Size Markings: Features visible size indicators on both ends for instantly identification, saving time during plumbing maintenance tasks under sinks for Danco 80439: Specially designed to securely onto Danco 80438 compression seats without slipping or, damage to your hardware unlike generic wrenches, Manufacturer: FROMCEO