Firstly, you can change the blade without the need for any screwdriver or other tools.  Simply unlock the wheel on the front by turning it anti-clockwise with your thumb, and then hold button on the back to release the spring while you replace the blade.  Once you have changed the blade, tighten the wheel again.  This double blade lock (wheel + spring) means that the blade is held securely and tightly in place while scraping at all times.  No loose blades, no scraped rubbish clogging up the blade channel, no frustration.

Secondly, the scraper has a hammerable end, making it suitable for removal of even the most stubborn substrates including floor tiles, adhesive, wall tiles, coatings, carpets, linoleum and practically any other hard to remove surface.

When the scraper is not in use it has an easy clip-on blade cover to protect your fingers when hunting through your tool kit.

This tool will last.