THE BASIC PRINCIPLES OF TYPES OF SCREW HEAD DRIVES

Generally known as pig nose or twin hole, this screw head has two spherical holes which are opposite one another and resemble a pig’s nose. This is a stability-style screw to forestall tampering. You'll need a Particular spanner screwdriver for this type of screw head.These screws have the looks that there is a hat or cap on the top from the scre

A Unique type of bolt that is definitely established into concrete, with screw threads protruding over the concrete surface area to just accept a nut.Pin screws are The most typical tamper resistant screw, they have got very same structure just like a cross shape in Philips screw getting added layer that is supplied for your avoidance of quick remo