"Used about 60 of these on my workshop build without a single failure. Pz3 bit required, no problems with sheared off heads even with my impact driver. Also suitable for fitting upvc doors and windows. Would use these again,"
"Great price but poor performance. Some of the Screw heads "shave out" leaving you with no choice but to extract screw with pliers and starting again with a new screw. Seems that the metal of the screw is very soft. I did use a new screw bit of the right size but was still left with one nearly engaged screw that I needed to drill out - what a waste of time that was!!!."
"These fixings are very poor quality. The steel of the screws is very soft and so if you don't manage to chew the screw head up you end up snapping the screw leaving you with an unusable and irremovable fixing in your frame.
Spend your money on the Fischer alternatives - they actually work and the steel wont go runny on a warm afternoon."