Multi function scraper. Interchangeable head allows three applications in ONE tool. Polishing pad to clean walls of glass and acrylic aquariums. Gravel rake to tidy gravel displaced by fish activities or gravel cleaning. Stainless steel scraper to scrape stubborn algae from glass aquariums (not suitable for acrylic aquariums). Compact design and quality construction. Easy access to hard to reach spots. Adjustable length to reach deeper aquariums without getting hands wet.