Kason 1245 Reversible Cam-Rise Hinge Industry standard self-closing cam-rise hinges enables the door to open with minimum effort Strong self-lubricating nylon cam delivers smooth, trouble-free door operation Cam-rise action reduces gasket wear, even with irregular floors Built-in dwell holds door open beyond approximately 135 degrees and doors lift off without disassembly or removing hinges Simple manual operation reverses hinges for use on right- or left-opening door