Features: brand new and high quality Improved crab claw clamp, main body made of aluminum alloy, which is durable and reliable. The opening angle increased, expanding the scope of application; can be installed to glass, steel or desktop of the minimum thickness of about 10mm, and can also be mounted to round, square or irregular shaped objects of the diameter of about 50mm. Calipers mating parts is strengthened, lock or open by screw stepper control, more solid and stable. Allow installing cameras, flash units or other devices via 1/4'' adapter screw to achieve more uses. It can be extended to connect accessories such as magic arm, and can also be used as a fixed bracket for outdoor street shooting. Specifications: Material:Aluminum Alloy Extended range:Approx.1-5 for cm/0.39-1.96 inches Package Includes: 1x Crab Claw Clamp note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.