Reinforced engineering plastics : high-strength engineering plastics , high hardness , not easy to break when touched , strong and High-strength gear : imported machine production , fine workmanship , high Movable chuck : 120-degree adjustable design of the chuck , which can hold irregular objects Using 45 # steel , high-frequency quenching treatment , while increasing the strength of the clamp rod , it also ensures the toughness of the clamp rod , and the service life is longer and not easy to break Fast reverse clamping : Reverse can be done by unscrewing the screw, Manufacturer: Watreketal