MD Keychain and Stethoscope Pendant, Metal, Gold and Silver Color (Physician/Doctor/Medical Student) MD Keychain (1.4 x 3.5 inches) with Stethoscope Pendant (13mm x 23.4mm) Revolving face with an MD symbol on one side and a Stethoscope heart/EKG design on the other face. Metal Get it as a gift for yourself, a colleague, medical student, or medical graduate. Modern Stylish Design