HausenFolding Car Parking Barrier Post Vehicle Driveway Garage Security Bollard, 3 Keys Included with Each Barrier

Q: What size drill bit is needed for fixing holes

For good anchoring I used 16 mm drill strong as hell you will never move it .

Q: Bought one of these and its now not unlocking after only a few months of use. Any ideas why? Or how to cure??

Take the plastic lid off at the top and you will see how the lock mechanism works….they’re easy to fix but unfortunately these posts are RUBBISH so it will continue to break! I got rid of mine and bought proper folding posts.

Q: Can this be installed onto block pavement , can the blocks be drilled into to install this barrier

Yes you can install it...you will ned a very hard tipped masonary drill and employ low speed to drill through. Whilst drilling remove the accumulated dust from time to time to facilitate the drilling proces.