Ok, I’ve understood.
The STAR spacer star is the simple and practical tool for creating uniform gaps when building wooden terraces.
Thicknesses of 4, 5, 6, 7 and 8 mm.
ONE-HANDED TERRACE CLAMP
ANTI-VEGETATION TARP FOR SUBSTRATES
BUTYL ADHESIVE TAPE
GRANULAR RUBBER SUBSTRATE
ADJUSTABLE SUPPORT FOR TERRACES