Generally known as pig nose or twin hole, this screw head has two round holes that happen to be opposite one another and resemble a pig’s nose. It is a safety-model screw to circumvent tampering. You may need a Distinctive spanner screwdriver for this type of screw head.A companion for sex screws. They've a system shaft as well as a threaded part

The flathead screwdriver is among the oldest around, as it was invented inside the 15th century. This sort of screwdriver features a flat shape with only one slot, and it engages a screw with only that solitary slot.This type of screwdriver head is ideal for programs that call for significant-speed screwing without the chance of the screw head slip