Exercise device, for athletes, office staff, etc., has expander and rubber cord connected to adapter plate for wedging in closed door

摘要

An adapter (1) connected to an expander (2) and rubber cord is designed to be wedged between the door frame and leaf of a closed door. The adapter comprises a sheet of stainless steel with a thickness of 1.2 mm and a width of 9 cm. The adapter is five-sided, all sides having an angle 90[deg].