Special pull screws - Pull-screws are especially produced for a maximum of stability, reliability and resistance against breaking under traction or sideways forces. The thread itself is also optimized for the purpose of pulling. In order to facilitate screw driving all pull-screws possess a Torx TX-20 head. It is possible to use either a manual TX-20 screwdriver (best with a T-shaped handle) or an electric screwdriver with a TX-20 bit. The use of lubricant such as cutting oil etc. facilitates driving the screws in the keyway.
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