Dragon International Services and Development LLC series of rotary stone grabbers and steel grabbers adopt Special steel material, light in texture, high elasticity and high loss resistance; adopts new reducer-type motor; adopts small-tonnage excavator slewing device and uses brake pads for braking, thus greatly improving service life and stability of unit and efficiency; largest opening width, minimum weight and maximum performance in same class; in order to enhance strength, a special large-capacity oil cylinder is used. Operator can control rotation speed and can rotate freely 360 degrees clockwise or counterclockwise. use of special rotating gears extends product life and reduces maintenance costs. It can perform all clamping operations such as stone work, waste work, pipe work, masonry work, etc.