The Mueller-Kueps Quick-Lock Razor Scraper is unique because it reduces the time you spend on trying to remove and replace the blade. Instead of having to twist out the screw you can quickly slide back the knob to release the blade and then slide the knob back up to secure the blade again. A two-component handle with rubber coating provides a secure grip. The scraper comes with five steel and five plastic blades. The plastic blades can be used on paint, while the steel blades can be used to remove adhesives and more from a variety of surfaces such as steel, glass, etc.