This heavy duty box or file drawer slide is constructed with ultimate precision. In fact, this slide has continued to be one of our top sellers and remains very popular. It supports a 100 lb capacity and features a full extension plus overtravel, telescoping slide on precision steel ball bearings. Flexible mounting tabs self-adjust to assure side clearance and polymer stop cushions make closing drawers softer and quieter. Sold by the case only, 10 Pair/Bulk Case, screws not included.