Wall plugs prevent screws from slipping out of a masonry wall. When you plug a screw hole, you will need to make sure that the plug is the appropriate length and diameter for the screws you are using.
Another factor to consider when buying plugs is how heavy the load being placed on the fittings will be. If you are nailing battens or fixing lightweight objects such as picture frames to a masonry wall, you may not need a wall plug as masonry nails will have sufficient gripping power.
There is a wide selection of wall plugs available; the most widely used are described below:
Hollow cavity walls will require a different type of plug. There is a wide selection available but it is important to remember that none of these cavity wall fixings are suitable for heavy loads.