The locking driver is use to insert screws. The inner connector interfaces with the screw head while the free spinning outer sleeve makes a secure connection with the threads of the tulip so screws drive straight in the direction you intend.
The locking driver is use to insert screws. The inner connector interfaces with the screw head while the free spinning outer sleeve makes a secure connection with the threads of the tulip so screws drive straight in the direction you intend.