We only carry high end frameless sliders. The handles and towel bars we use are the same high quality hardware we use on our frameless shower doors. Unlike some frameless sliders that have cheap clamp on hardware, our handles and towel bars go through the glass on our 3/8” units, the rollers also go through the glass. When you get into 3/8” sliders, there is a difference even in through the glass rollers. Our units come with four rollers per piece of glass, not just 2. This distributes the weight for a better rolling door, and increases the life of the rollers.