types of screw heads list - An Overview

Chucks are specialised clamps built to carry objects possessing radial symmetry such as cylinders. They ordinarily have jaws to protected the workpiece. The jaws (or pet dogs) are organised in the star-like configuration with radial symmetry.A spanner screwdriver features a flat head and it is made use of with tamper-evidence spanner screws. Spanne

read more