The normal slotted head is best applied using a flat screwdriver, while the cross-formed indention is best suited to your Phillips screwdriver. A Robertson screw includes a sq.-shaped indention and demands a matching driver head. Thread forming screws are similar to thread reducing screws, but in place of removing materials https://wood-screws32420.webbuzzfeed.com/28838194/top-latest-five-wood-screws-urban-news