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Screw Features & Special Properties
Special properties
    A. T-STAR plus: secure bit grip, no cam-out effect, optimal force transmission
    B. 4CUT (for screw lengths of 160 mm and larger): significantly reduces the screwing in torque
    C. Partial thread: firm tightening of the upper wood layer
    1. 4CUT: allows screwing in without pre-drilling (wood-dependent), reduces splitting as square end displaces the fibres
    2. Ground serrations: up to the point – quick and secure fastening
    3. MULTI Head: flush countersinking. Mills in wood and stops on metal