Thank you for viewing! This product is a sandbag wall-mounted type, a tool for traditional training methods. It also comes with a hook. It's been made small for easy training! The black part is made of rubber, and filled with sand to a moderate hardness, allowing for training of fists, back fists, wrist strikes, knife hands, back of the hand strikes, hidden fists, and more. Size changes are also possible. Please consult before purchasing. Product Size: Base board length: Approximately 24 cm (height) x 9 cm (width)