Guide screw for correct fitting of drill to remove screw stubs has boring to act as guide for drill and is screwed into remaining usable threads above break-off point

摘要

The guide screw is used where there are still usable threads above the break-off point. The screw has an internal boring, which acts as a guide for the drill bit to be used, The screw itself is screwed into the remaining usable threads in the threaded boring above the break-off point. The guide screws are produced in sets of screws of different strengths, sizes and materials.