A Robertson screw, frequently often called a sq. or Scrulox screwdriver, provides a square-formed slot during the screw head and a sq. projection on the tool. it really is designated as an ANSI kind III Square Heart screw. The socket plus the Software both Possess a little or no taper. Ratcheting screwdrivers offer a speedy and effective method to

Photograph: istockphoto.com supposed only for putting in drywall panels, this kind of screw ranges in length from one inch to 3 inches. Their “bugle” head is built to countersink marginally within the surface of your drywall panel with no tearing the panel’s protecting paper covering; consequently the name bugle head screw. The generate type