#10-32 x 1-1/2" Black Machine Screw Button Head Security Hex

These screws are perfect to use for every product really easy to use and ensures that only a select group of people with the right bit for these can put in or take out drivers. Be sure you buy the bit to go along with these screws if your dont already have it! The only knock against these screws is the price

I was dissappointed to realize after receipt that this product requires a special tool to install properly, hence, I now have to find a new tool among my many which I will end up using only once. If you look closely into the hex head, there is a protrution which will not allow a normal hex driver to fit. The hex driver required will need to have a hole along its center axis to allow the tool to fully seat. Had I known this, I would not have bought these expensive screws!