Support range: 0-2 Inch (0-5.5cm), Supports round, square and irregular objects Material: Aluminum alloy,100% brand new and high quality Ideal for holding small parts, Jewelry, Watch, Hobby, Model making, Electronics, Home and Work-Bench and many other applications. Package included: 1x Carving Bench Clamp, 4xsupport columns,4x Fixed with screws Handheld use, compact and handy.