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Additionally, copper door handles have been shown to be effective at suppressing bacterial growth. Source: Wojgani H, Kehsa C, Cloutman-Green E, Gray C, Gant V, et al. (2012) Hospital Door Handle Design and Their Contamination with Bacteria: A Real Life Observational Study.
This type is found commonly on lever-style door handles. To depress the detent,...MORE use the end of a metal paper clip or the point of an awl, inserting it into the hole and pressing the detent down while twisting and removing the door handle shaft off the spindle.