Blum Tandem B569. series soft-closing, heavy duty, full-extension undermount drawer slides for 5/8” and 1/2” drawer sides. The B569. series is for use in box style frameless construction or face frame cabinets with blocking on the cabinet side that is flush with the face frame. Available in three sizes for 24", 27" or 30" drawers. Features include four-dimensional adjustment, elongated holes for depth adjustment, bottom mounting holes and 150 lb. static load capacity. These slides also allow for side-to-side tool-free adjustment when using the BT.1901 locking devices and side-to-side plus depth adjustments with the BT.1901.PS which is very desirable for drawer front alignment when building inset cabinets, sold separately. One set comes with a left and right slide to do one drawer.