How To Remove The Inner Hexagon Of Socket Head Screws Slipped

1. Find a round steel of appropriate size and weld it to the screw head, then weld a cross bar as a handle or use a pipe wrench to remove it.

2. Use a small steel chisel to slowly loosen it at the screw head along the tangential direction.

3. Drill a hole in the middle of the screw with a smaller drill bit, and then slowly tap the remaining part of the screw with a tap.