This Kit Includes 4 Anchor Blocks worth £25.00 A garden building base kit made from ProBase grids to form a firm, strong, long-lasting and well-drained foundation for a garden building. Which also includes an anchoring system called Anchor Blocks. ProBase Quickfit Shed Bases are designed to provide a firm long lasting base for garden buildings. Each kit comprises a number of super strong, heavy-duty grids made from 100% recycled plastic. Each kit comes with a heavy duty weed resistant membrane cut to size. ProBase are lightweight and simple to install, simply interlock the grids. ProBase is suitable for all garden buildings including timber sheds, plastic sheds, workshops, summerhouses and log cabins. Anchor Block is an Anchor Assist system that is designed to help secure your building to your ProBase. The Anchor Block will fit into any cell within your ProBase. ( Pull tested up to 60kg of uplift per Anchor )