23-05-14, 04:43 PM
No, it's a conventional thread.
I always use an old wood chisel (or an old screwdriver that's been sharpened), just position the blade on the rim of the filter aiming at an angle so that tapping with a hammer partly makes it dig in to the metal slightly and partly forces it round in the desired direction.
I always use an old wood chisel (or an old screwdriver that's been sharpened), just position the blade on the rim of the filter aiming at an angle so that tapping with a hammer partly makes it dig in to the metal slightly and partly forces it round in the desired direction.