The Stethoscope Reflex Hammer is a simple device that snaps around the chest piece of a stethoscope to create a reflex hammer. The intended users are doctors performing general exam on patients. Previously, doctors would have to carry both a stethoscope and a reflex hammer with them at all times. The reflex hammer needs weight and is, therefore, heavy and bulky to carry--typically sticking awkwardly out of lab coat pockets. The challenge was to design a reflex hammer attachment that would not interfere with the stethoscope's vital function and would fit various stethoscope models.