INDICATORS ON TYPES OF SCREW HEADS YOU SHOULD KNOW

Spanner- Spanner drives have two holes in the head from the screw that locks right into a screwdriver or drill little bit during set up. This screw is commonly used in order to avoid tampering. Flange screws are sometimes generally known as frame screws. The head of those screws can differ from round to hexed, and it juts out from a round