The Robertson screw

The Robertson screw slot robertson screw This screw is actually a Canadian invention! Back in the late 1800s and early 1900s, the only screw available was the slot head screw However, slot emas88 A Robertson screw, also known as a square screw or Scrulox, is a type of screw with a square-shaped socket in the screw head and a corresponding square

slot emas88 Even the best screws can get stripped A stripped screw is one in which the slots in the head of a screw have worn out This makes it hard for a screwdriver

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