For A Permanent Fixing Into Block, Brick & Concrete. Through fixing, exremely econmical and quick to install. Anti-corrosion zinc and yellow passivated finish. Bolt projection holding down fixing. Suitable for fixing racking, handrails, brackets, machinery, seating and many other applications. Through-fixing for ease and speed of installation. Zinc and yellow passivated anti-corrosion finish. The sleeve wedge cones are designed to give maximum expansion even in shallow anchoring depths. Reduced outside sleeve diameter compared to thread size for smaller hole sizes, offering reduced stress in base materials.