FASCINATION ABOUT TYPES OF SCREW HEADS FOR SCREWDRIVERS

Also known as pig nose or twin gap, this screw head has two round holes which have been opposite one another and resemble a pig’s nose. It is just a security-model screw to stop tampering. You will need a Particular spanner screwdriver for this type of screw head.A mixture drive screw head allows for both equally phillips and flat bladed screwdri