Wedge Anchor Through Bolts are one (1) piece heavy-duty pre-assembled torque controlled mechanical expansion anchor. When tightened the anchor draws the tapered end of the bolt into the expander clip forcing it out and creating expansion forces against the wall of the hole. Designed to be used in concrete solid masonry and stone. Features / Benefits: Suitable for overhead applications and is removable. Ideal for fastening columns and beams. Perfect for quickly fixing steel and timber structures to a range of base materials: Concrete Brick Block Marble Stone. Suitable for both residential and commercial construction Material / Coating: Galvanised is a dull greyish colour and can be a little rough in appearance and is mainly used outdoors because of its superior corrosion resistance and proven longevity. Also known as HDG it is one of the best coatings for protection against rust. Galvanised fasteners have been used across many industries in Australia for over 150 years in construction roofing steel buildings trailers bridges fencing power poles marina’s are just a few examples. Used when referring to Metric parts. For example a thread pitch of 1.50mm means that the distance between one thread and the next is 1.50mm Fastener length: is generally measured from the point where the surface of the material will be when the fastener is installed to the end of the fastener. Although provided by one of our suppliers the brand supplied may be different. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person and Bolt and Nut Australia is not responsible for any loss claim or damages arising therefrom.