Similar to other tamper-resistant designs, these hex screws reduce tampering with a little pin in the middle on the generate.
A probable adaptation towards the Phillips head, the tri-wing screw has a little triangular https://larissaabyp296358.blogpostie.com/48988966/how-much-you-need-to-expect-you-ll-pay-for-a-good-types-of-screw-heads