I'm new to retirement and woodworking, so this may be the wrong way to do this but I am THRILLED with the results! I was looking to build a very wide, shallow, relatively deep drawer under my workbench to store my long straight edges and things I use every day. I mounted the glide rails to the bottom of the drawer and the slide blocks to the frame I already had underneath. I dropped a few bolts into the back end of the glide rails to prevent the drawer from coming out too far. End result is awesome! It's the little things in life! Rails are strong, solid, and straight. Slide blocks also seem solid (the ones I got accepted M5 machine bolts) and I am optimistic the ball bearings will last. Thank you!