Hinge Pins for Pocket and Bangle Watches Hinge Pins for Pocket and Bangle Watches is an assortment of 100 brass hinge pins for case hinges -- offered by Eufor. When replacing lift springs on pocket watches and claw springs on bangle watches many times it is important to address the hinge of the covers. This pin assortment aids when correcting and/or repairing these type of case hings. Other assortments are available.