"I have just fitted 11 of these with Steel Wired Armour (SWA) cable. So when I undid them to test, a large proportion of the screws snapped. I had to rebore the hole and use better screws as I did not want to reterminate all the SWA connections into a new box. I was not heavy handed, after the first few screws snapped I undid the others carefully, but still a fair few snapped, meaning the box would no longer be waterproof. If it wasn't for this it would be a good box, however due to the importance of the screws and their poor quality I would never buy this product again as it was so much hassle."