Use a screwdriver. LOL I can't.. I don't know how, BUT I got a 50 ton press that says they will be one with the music and never come loose in your lifetime EVER.. :-) Do you know you can get 10 TONS of pressure with hammer strikes, one handed.. NEVER move again.. A speedo cable arbors is what I use now for cold welds.. Easy if you know what it is and what your doing.. It is the BEST way to join anything electrical, Compound crimps too.. Screws come loose. I've retighten my mains 10 times in 20 years at least.. JUST to clean the contact..