Scraperite double-edged plastic razor blades are great for scraping and cleaning wherever a metal blade would be inappropriate. They'll never rust or corrode and they are non-conductive and non-magnetic.
Acrylic (YELLOW) )blades - Window, granite & marble, metals, unfinished wood, rigid surfaces
Polycarbonate (BLUE) blades - Fibre glass & gel coats, soft metal, bath tubs & tiles, gaskets, uneven surfaces
General Purpose (Orange) blades - Auto paint, painted surfaces, soft surfaces, plastics, finishing wood
Available with a Holder + 5 pack or 25 pack of blades. Variety pack comes with holder + 8 of each blade