Unique caterpillar shelf bracket is very strong and simple to fit together with any 18mm thickness laminated or painted shelf boards. The caterpillar bracket can be fitted to masonry walls using the screws and wall plugs or to hollow gyprock type walls using 2 of these HW3 hollow wall fixings here . Recommended are the shabby chic vintage white 18mm shelves here, or here. The shelves are fitted into the 2 provided slots in the caterpillar bracket and the 2 supplied wedges are inserted underneath the shelf into the slots, securing the shelf tightly and securely. Weight capacity of up to 15kg of evenly distributed load when fitted to drywall/gyprock sheet using the recommended wall anchor s. We do not recommend wall mates brand anchors for fitting shelving brackets to gyprock sheet.