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Screw Features & Special Properties
Special properties
    A1. Cylindrical head: for the assembly of wooden profiles
    A2. Flat countersunk head: for the installation of plastic and aluminium profiles
    B. T-STAR plus: secure bit grip, no cam-out effect, optimal force transmission
    C. Blue zinc plated A2J
    1. SPAX typical ground serrations: quick and secure fastening