Open a drawer equipped with Blum Tandem Plus Blumotion slides and by the time it’s closed you’ll be won over. Incredibly smooth full-extension action combined with a self closing mechanism that engages 2″ before the drawer is closed and ever so gently eases it back into the cabinet make these slides truly top-of-the-line. Add to that the fact that the slides are totally concealed-no clunky metal to detract from the beauty of your wooden drawers- and you have a recipe for a classic. This newest generation of Tandem Plus Blumotion features mounting holes on the bottom of the slide housing except 12″ slide so you can mount the slides directly to a horizontal surface four dimensional adjustment and elongated holes for depth adjustment. Made in the USA. For faster more flexible adjustment of your drawer fronts try the optional Adjustable Drawer Locking Device 46209 which replaces the standard locking device that come with the slides. Technical Details: Full extension concealed runners with BLUMOTION soft close. Load capacity: 90 lb dynamic 100 lb static. Zinc-coated steel. Concealed roller carriage with permanently. lubricated synthetic rollers. Available in standard and heavy duty. For drawers with up to 5/8″ side material thickness.1/2″ recess required between drawer bottom and bottom edge of drawer side. Elongated holes for depth adjustment. Bottom mount holes on 15″ 18″ and 21″ slides. Tool-free tilt adjustment. Tool-free rear side-to-side adjustment. TANDEM runners are designed for the American 3″ increment cabinet depth system. This feature permits overlay or inset applications to use the same runner. Full length runners make installation in panel or face frame cabinets possible.