18 in. Soft Close Full Extension Undermount Drawer Slides Kit (6-Pair)The 3300 series undermount drawer slide has a chromate finish and a soft close design that ensures your drawers will never slam shut. The drawer is full extension and can support up to 85 lbs. It also includes front clips and back sockets. Please note that screws are sold separately. Slides are available in 12 in., 15 in., 18 in. and 21 in. L. For use with 1 2 in. and 5 8 in. drawer boxes Full extension undermount ball bearing slide with built in soft