"These are so cheap from Screwfix yet they are still good quality. If you need to have a strong fixing use them with the head visible as a feature of the design. Plating is even and stays on around the hex recess after you've tightened it up."
"I bought these to aid security to my hinges on my shed, but due to a tapered shank underneath the hex-head I had to ream out the holes in the hinges. Good result in the end and good value and quality product. Only 48 in the previously opened pack though, looks like the customer only required two!"