Razor Scraper with Storage of Blades Plus Adjustable

Im in the sign business and I have tried many many scrapers. This is one of the best one. Sturdy, adjustable handle. it has a storage and the extra blades do not move around so you wouldn't even know they are in there. It comes with two thicker metal blades that will probably never chip or brake. I have never even seen those before. usually i only see the very sharp metal blade and the plastic blades.

barely does the job of scraping off the algae from the tank walls ... thought that as a 'razor' it would do a better job then it did.