The Pro 4" Wide Blade scrapper 65-0002 by American Line houses a disposable blade that is durable enough for scraping rough surfaces and is precision ground which makes it ideal for scraping delicate surfaces such as tile and glass. The scraper has a patented locking design for securing the blade while at the same time allowing you to easily change the blade. The handle has a unique design with softer than plastic bi material and a recessed area for your thumb allowing it to work with the design of your hand to relieve muscle strain.