MaxxFast THRUMAXXis a torque-controlled expansion anchor made of zinc plated galvanized steel of the sizes in the range from M6 to M20 and may only be used in non-cracked concrete subject to dry internal conditions.

MaxxFast THRUMAXX A4 is a torque controlled expansion anchor made of stainless steel of the sizes in the range of M6 to M20 and may be used in non-cracked concrete subject to dry internal conditions, also in non-cracked concrete subject to external atmospheric exposure or exposure in permanently damp internal conditions, if no particular aggressive conditions exist.