Zeadio Low-Profile Dragon Claw Clamp-on Barrel Bipod for Hunting Shooting Air Rifle Gun High-tech durable aluminum construction Clever adjustment wheel for wide range of barrel sizes from 11mm to 19mm Unique Posi-Lock feature to prevent tipping Foldable with fully adjustable leg length from 7 to 10 inches Rubberized stand is coated to increase the friction between the stand and surface for a more stabilized position