Raimondi Rai-Fix Stainless Steel Hooks are part of the Rai-Fix Mechanical Fixing System for wall installation of large, heavy tiles and slabs. Three sizes are available: 5mm, 6mm and 8mm to cater for different thicknesses of material to be fixed. Various pack sizes, of 70, 120 or 500 pieces. The plates have teeth to grip into pre-cut grooves. Rai-Fix for mechanical fixing tiles and Rai-Fix for mechanical fixing stone facades.
This chart can help you determine how many you may need.