The 4" Window Scraper/Wall Stripper is a valuable tool for removing old vinyl graphics. The sharp blades cut under vinyl and scrape away adhesive. Made out of metal, this vinyl stripping tool is build to last. Replaceable blades provide maximum performance. This tool is strong and sharp. It is best suited for glass and unfinished metal surfaces. Use with caution, as it is very capable of scratching paint and damaging drywall.