It could work with the sides of the head.. just find some part of the screw where you can put the centre punch against it, tilt the centre punch at 60 degrees or so and give it a few hits with a hammer.
It could work with the sides of the head.. just find some part of the screw where you can put the centre punch against it, tilt the centre punch at 60 degrees or so and give it a few hits with a hammer.