South Main Hardware ball bearing drawer slides include telescopic full extension. These drawer slides are made from cold rolled steel and have a maximum weight capacity of 100 pounds. Total width is 1.77" or 45mm. These slides have a thickness of 1.2 x 1.2 x 1.5". these drawer slides are great for replacing old or worn slides in your home, office or school. Recommended for use on cabinet doors, bedroom furniture, bathroom cabinets, and office cabinets.