As I explained to you prior to, the safety hex screwdriver is actually a hex screwdriver but that has a hole in the middle, built to be tamper-proof. If you want to use your screwdriver for lengthy periods with no https://joycerdhz523027.worldblogged.com/35461727/the-smart-trick-of-types-of-screw-heads-that-no-one-is-discussing