Features:1. Improved crab claw clamp, main body made of aluminum alloy, leverage and axes made of stainless steel; 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;2. Calipers mating parts is strengthened, non-slip rubber is replaceable, lock or open by screw stepper control, more solid and stable;3. One plier designed with 1/4'' female thread and the other one with 3/8'' female thread, which allow installing cameras, flash units or other devices via 1/4'' or 3/8'' adapter screw to achieve more uses.Specifications:Maximum dimensions: 8.0 X 5.7 X 2cmPackage Include:1 x Magic arm crab claw tongsNotes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.