Knape & Vogt 75 lb. class full extension drawer slide delivers concealed undermount function with a smooth, quiet soft- close operation. This drawer slide is recommended for drawer material thickness of 1/2" to 5/8". It features two-dimensional front release lever adjustment- height and side-to-side. The soft close slide is designed to meet or exceed ANSI performance standards established by BIFMA, BHMA, and KCMA. It features a limited lifetime warranty.