The trolly wheels that came with this door are not adequate to support the weight of the door. As a result the door does not glide as easily  as it should. In addition, the cam lock pins are about 6mm too short. It's  difficult to lock them in place properly. The rail contains some burrs preventing smooth wheel roll. Also, one of the frosted glass panels contained a noticeable spot imperfection. Very poor quality control. Because this is a 42" wide door It's weight required larger hub bearing wheels.