Gympak Commercial handle straps have been continuously evolving for 20 years. At first, we implemented the steel tube due to complaints that the handle would bend or give. Next we added an inner plastic sleeve to lengthen the life of the strap as they move over the motion of the machine. We decided to go one step further and upgraded the nylon strapping to the same specs seat belts cars and planes. Each strap is then fitted with a welded D Stainless steel D ring sewn on in a double cross pattern.