“Ignoramus question – exactly how do you use the hollow wall anchors?”
Without a special tool this is what I do:
– drill a hole, just the right size that the anchor will fit neatly / snuggle (you don’t want it to spin. In my case 6mm is the right size, but I prefer to drill a 5.5mm hole and then use the anchor to widen it up to fit neatly.
– screw up the anchor (if using a power tool beware its possible to strip the threads with too much force).
– as it screws in, the far end of the anchor is pulled towards you bending the four “legs” outwards behind the plasterboard. You don’t need to do it up very tight, but if you are going to screw through a thick fitting/bracket on the item you are handing it will need to go most of the way.
– now unscrew the screw. Put the screw through the hole in the item you are hanging and screw it up. Again beware that overdoing the torque will strip the threads in the anchor giving you a problem (it will be useless and be difficult to replace)
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