Miniature ball bearing drawer slides open in both directions for extended length of travel. Precision-rolled steel channels fitted to steel ball-bearings in a nylon carrier for vibration free rolling action for lighter drawer loads, desk trays, shelves, computer pullouts. Can be used in drawers with 17mm side grooves. 17mm wide x 10mm thick x 182.5mm long (closed) 0.70" x 0.40" x 7.2". Slide length is 7.2" closed and extends approximately 4.1" in either direction when open.