We bought a lovely wooden Simpli Home desk with a pull out/fold down keyboard tray. The reamers were cheap and didn't reach far enough to support a laptop. So we removed the slides that were on the table and installed these 14 inch full extension slides. Difficult to find guides thin enough to fit the space (0.40 inch). They match the drawer perfectly. THE SCREWS WERE NOT INCLUDED IN THESE rails, so we reused the screws from the removed rails. The new slides work perfectly, are now strong enough and slide out far enough that the entire drawer can be used as a laptop table. Good buy!