HC200090N.. Concealed Non Bore Self Closing Concealed Top Lid Hinge. Up-opening concealed top-lid hinge (90 degree opening) Flush-opening lift-lid hinge for hampers, chest lids, and piano benches. Surface mounted, no hole-boring or pre-mounted plates. Steel, nickel plated. 5-3/4″ long by 13/16″ wide, Spring Closing. Sold by the Each. Hinge weight capacities as follows: 2 hinges = 13.22 pounds or 6 kgs, 3 hinges = 24.25 pounds or 11 kgs, 4 hinges = 35.27 pounds or 16 kgs, 5 hinges = 59.91 pounds or 24 kgs. 59.91 pounds is the limit.