I see a lot of folk using these spiral, self-drilling plasterboard / drywall fixings - also sometimes known as helter-skelter fittings. Personally I hate them and in this video I'm explaining why. I'm testing some Fischer PDN and PDM fittings in 12.5mm plasterboard. If you still want to use them after watching this video then fill your boots. I very much doubt folk who feel the need to post abusive comments would bother to read the description of the video, but on the off-chance... as explained in other videos, the reason I'm doing an axial load test is for comparative purposes as this represents worst case scenario for the fittings. Fischer make awesome fixings - it's just this general design of fixing is rubbish. There are now much better alternatives such as the Fischer DuoPower and the Fischer DuoTec... and even the Fischer GPF (General Purpose Fixing) seem to perform better in my own limited tests.

Follow-up vid testing shear loads (spiral fittings of doom also performed terribly in this test too):
   • Shear Loads vs Axial Loads and recali...  

Want to know more about avoiding cables and pipes in walls? Watch this vid:
   • 8 TIPS to avoid Pipes and Cables in W...  

Want to see the full test video for the little Fischer LDF plastic plugs? Watch this vid:
   • How strong are Fischer light duty dry...  

Datasheet for these fittings, confirming recommended use (tensile, shear & oblique loads):
http://www.fischer.in.th/PortalData/3...

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