JINSE Bipod Dragon Claw Clamp-on Folding 5.1 Inches Bipod Wheel Size 11mm to 19mm High Tech Durable Aluminum Construction Center Height :5.1'' ,arms not extend out Foldable Arm can be folded up for easy carry and storage Clever Adjustment Wheel for Wide Range of Sizes from 12mm to 19mm Posi-Lock legs provide extremely solid, exceptionally accurate shooting support