Review on 🔪 High-Quality Plastic Razor Blade Scrapers Knife with Ergonomic Grip for Efficient Label and Decal Removal from Glass, Windshields, and Auto Windows - Ideal Tool for Application and Removal of Vinyl Window Tint - Includes 10 Replacement Blades by Rich Shankar

It's very easy to break the blades without much pressure, they just bend in length when you apply a little downward force. Very happy with the extra blades. Also, the blades will pop out, especially if you put some sticky caulk on them - they're just held in place by a couple of little plastic tabs. careful - so I wouldn't say it was a good buy for my needs (removing sealant from a fiberglass RV panel). Maybe I can use something lighter in the future.