Hardware Resources HR MAX Boring Machine Insertion Ram for 3390 Series Compact HingesHR Max = Quality backed by Lifetime warranty Boring Machine Insertion Ram for 3390 Series Compact Hinges Features: Solid steel construction guaranteed to last and to hold tolerances Magnetic and ball bearing catches integrated into ram to hold hinge in place during insertion Compatible only with HRBORE220SP machine Specifications: Hinge Type Ram ADA Friendly No Packaging Type Small Package Sold By Each Brand HR Max Finish Zinc Material Steel Warranty