"Increase the intensity
Insert one end of the inner hexagon (short side) into the adjustment hole (all the inner hexagon is inserted into the adjustment hole will make it impossible to rotate, insert two-thirds of it), turn clockwise, the force will be increased (when the inner hexagon does not move, The intensity has been maximum)
Decrease the intensity
Insert with one end of the inner hexagon (long end). The hexagon is against the ground. Hold the door closer and press it down hard. (Belonging to restore the initial strength)
Arm base
1. Reduce friction and avoid damage to the door and arm
2. It can play a mute effect
Smooth scroll wheel
Nylon rollers, the door opens smoothly and silently
Bold boom
Thicken the iron arm to make the closing force more secure"