Pair of Amerock Burnished Brass Concealed Self-Latching 1/4" Overlay Pivot/Knife Cabinet Hinges BP2603-BB 1 Pair (Set of 2) 1/4" Overlay Knife Hinges for doors at least 1/2" thick; Wrapped in pairs; Screws Included Amerock Marathon hinges incorporate self-lubricating, space-age polymer for flexibility and endurance. Exceeds 250,000 cycles - outperforms conventional knife hinges and KCMA standards; Performance is 10X greater than KCMA certification standards. High-strength steel frame, full 180 opening, locating tabs for quick positioning and 1/16" vertical and horizontal adjustment. Replaces Youngdale #3