Features: Adjustable Stud Spring 6"-9" Fits all Standard 20 mm Rail Quickly Attach to or Detach From the Rail Mount Using Existing Quick Release Screw Quick Release Button for 5 Level Locking Positions Legs with 12mm Increment Legs can be Folded Material: Made of Durable， High Density Aluminum Extension Length: Approx.15cm(6") ~ 23cm(9") Package Included: 1 x Hunting