1. This mechanism is suitable for ordinary straight and Z-type electric screwdrivers that cannot be used normally due to narrow space and interference directly above the screws, but can be normally locked by avoiding interference through this mechanism.

2. The center distance of the driver head part of the mechanism is 4.0mm, and the maximum locking torque is 1kgf.cm, which is suitable for the locking environment where the screw center distance from the edge is less than 4mm and the torque is less than 1.0kgf.cm (see the figure below for detailed space dimensions).