South Main Hardware bottom mount drawer slides are made from cold rolled steel and have a maximum weight capacity of 55 pounds. Their TOTAL width is 0.88 inch or 45mm. These slides have a thickness of 1.2 x 1.2 x 1.5 inch these drawer slides are great for replacing old or worn slides in your home, office or school. Recommended for use on bedroom furniture, bathroom cabinets, and office cabinets or file drawers.