"Brought these for a double glazed door . They worked perfectly and had a very good fixing in the brick work .By drilling a 6mm hole the screw then cuts its own fixing. Remember to use a long enough drill bit when drilling . They come with a T30 bit which makes screwing them easy as the bit holds tight . Will use these over hammer fixing any time .."
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Review 3 for Powerline Frame Fixings 7.5 x 122mm 100 Pack