The Toko Structurite Tool is an excellent, press-in base structuring tool for cross country skis. The nice aspect to pressed structure is that it can be pressed in as one of the last applications of your base preparation, and it is not permanent, so it can be changed as the snow and weather conditions change.
The medium (red) roller comes with the tool, and you can add the blue/fine linear for cold snow and the yellow/coarse for wet, warm snow. The structure patterns can be used alone or in combination depending on the snow.
The maximum width is 48mm which easily accommodates race skis. Due to the single roller, this tool works best by pressing the entire length of the ski, as opposed to lifting the roller over the grip zones of classic skis.
Structurite Tool usage from Ian at Toko