The standard slotted head is ideal made use of using a flat screwdriver, when the cross-shaped indention is greatest suited to your Phillips screwdriver. A Robertson screw features a square-formed indention and demands a matching driver head. Wood screws have a threaded shaft. They're used to join two pieces of https://timcoscrews19741.bloguerosa.com/28089070/how-much-you-need-to-expect-you-ll-pay-for-a-good-screws