A holder for toko structurite rollers so you can apply structure to wider skis. I've used this on my backcountry skis by taking multiple passes. 

Example link to a structure roller https://www.skirack.com/products/toko-red-structurite-roller-3383210?utm_source=google&utm_medium=organic&utm_campaign=SR%20Google%20Shopping&utm_content=Red%20Structurite%20Roller&srsltid=AfmBOoqkryTONebWAHtMYeI4KtbaqLNtSAHfu4ND2-qj3eFmI_OHYnHu9mo