While not a professional, I have used this type of anchor successfully in the past. They don't stick well enough to the drywall surface when the screw is being screwed in, causing the backing to expand and grip the backing. I have used them three times and every time I suffer! Now I have a hole in the wall and this POS stuck in it is spinning. I'll throw away the rest as soon as this review ends. I WOULD NOT BUY THESE.
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