Smart screwdriver, farewell to all troubles, it will save you time and worry
When the screwdriver reaches a certain torque, it cannot be driven, the chip will automatically receive the brake power off signal to prevent slipping
When the output torque is reached, the steel ball turns out of the pit, this will push the bouncing press sleeve to trigger the switch of the impact bar connected to it,
making the chip receive the brake power off signal
Release all the keys to assemble on this key, front tight and back loose, simple and easy
