As anchor bolts can be used with a variety of materials including concrete, brick, block and stone, there are an array of different bolts available that are best suited to the materials you are working with. Loose bolts are ideal for use with solid materials such as brick and concrete, but aren’t suitable when working with hollow brick. Projection bolts, which have been used by tradesmen for many years, are great for fixing into masonry and concrete, whilst hook bolts are also perfect when applied to brick, concrete and blocks.