The Robertson screwdriver, often known as a sq. screwdriver, contains a square-shaped tip. Invented by Peter Lymburner Robertson in copyright, this type of screwdriver is greatly used in woodworking and construction tasks. It provides exceptional torque transfer and minimized cam-out, rendering it a favorite option amongst Canadian DIYers and specialists. https://typesofgeodesicdome36925.bloggactivo.com/28945764/top-guidelines-of-what-is-a-lead-screw