WHAT DOES TYPES OF SCREW HEADS MEAN?

As I advised you in advance of, the safety hex screwdriver can be a hex screwdriver but having a hole in the middle, intended to be tamper-proof. Because the geometry is not recessed and comprises just two stacked basic milling slots, a double-slotted screw drive will not be considered to be cruciform. In ISO 4757, Cross recesses for screws, quite

They are also named as spanners; they offer stability with maintaining the finished appear. Their heads are flat where there are two smaller holes are furnished and so they need Particular tool for his or her set up and removing. Bugle heads are generally located in drywall screws, and The top design and style quickly compresses the drywall paper