This scraper for the price is great. There are a lot of more expensive ones out there that you have to buy the special blades for them. This one you don't, you just use normal Stanley knife blades. The blades are held by just the push fit so they can pull out if you are scraping very sticky stuff when you pull back. If you wipe it clean to remove excess build up its not a problem. As you are using a push motion they are being forced back into the seating. For the Diyer its a no brainer a great buy.