If the angular groove in the part requires the processing of a triangular file, but only one side with a notch (nearby to not participate in it), tape it temporarily any adhesive tape (e.g. Scotch tape or duct tape).
Recommend to read
DOOR FOR PIPE
When you put the samovar in the house, the smoke given often through the window pane But when you have to throw in a pitcher samovar wood or coal lumps, the room is filled with smoke. ...
SLOT, INSTEAD OF CRESTOMANCI
Often have recycled or intractable unscrewing the screws with a Phillips-head recess under the broken screwdriver. Help out a hacksaw or a chisel (which is better suited to the specific...
