Hilitchi 210 Pcs #8 Stainless Steel Button Head Torx Sheet Metal Screws Silver Security Anti-Theft Tamper Proof Screws Assortment Kit with Screwdriver Bit T20 (#8 x 1/2" ~ #8 x 1-1/2")

Great for protecting any screw on item that might be easily removed or stolen.

These workout great for adding a little extra security.Just remove an existing screw and replace it with one of these security screws

Needed these to affix stairs to a trailer (so that no-one could remove them). Solid and good quality - would recommend.

I like these screws. They are used to fasten metal to wood.

All good

My rating is 0 Stars: non-secure security screws! Finally tried to put the security fasteners to their intended use. The design and/or the manufacturing - inspection process of the screws is not very good. The concept is a mature design and quite effective when done right. The cylindrical obstruction to the use of a conventional T20 Torx driver on these screws is not long enough! Every screw I drove in to the test piece was removable WITHOUT the S2-T20 driver bit. I received these a while back before (attempting) usage so I can’t return them. I’ll not make that mistake again.

We used these to mount our tankless water heater outside. Seems to be working well.

These screws are not anti theft. A regular T20 fits into the opening on the head to be able to remove the screw.