Precise, adjustable spacing Multiple spacer thicknesses let you set optimal joint width for both longitudinal and transverse sides. Variable, tool-free adjustment between distance levels speeds installation and ensures consistent, accurate joints. Weather-resistant erosion protection Built from a special erosion-protection material that resists material loss from rain and wind. Provides reliable weather resistance for outdoor use and pairs well with pressure-treated boards. Improved drainage and airflow Designed to promote drainage and airflow under decking and slabs, reducing water retention. Helps maintain a stable hold during assembly so boards and slabs remain aligned while you work. Practical, versatile accessory Essential auxiliary component for composite floors and outdoor paving. Ensures even joint spacing for pool borders, patio slabs, garden paths and similar projects for a durable, neat finish. Typical applications Decking installation: quick, tool-free spacing for composite or pressure-treated boards; promotes drainage and keeps boards steady during fitting. Patio slab and pool-edge work: uniform joints around wet areas where erosion protection and drainage are important. Garden paths and outdoor walkways: consistent spacing for a clean, professional surface that resists weathering. What you get A variable spacer system that combines adjustable thickness selection, erosion-resistant material, drainage promotion and a stable hold during assembly — designed for reliable, repeatable results on outdoor projects.