The Aquascraper 4 in 1 cleaning tool means you have 4 tools in 1 by using 4 interchangeable attachments in 1 holder. Available in 6″, 12″, 24″ and 36″ handle lengths help you keep your aquarium clean without having to put your whole arm in your aquarium!. Attachments: 1) Coralline Algae Scraper (Acrylic Tanks) Allows you to scrape hard without the fear of scratching. The plastic scraper is 3″ wide and angled to give you the perfect leverage against the most stubborn algae. 2) Stainless Steel Scraper (Glass Tanks) Easily scrape all types of algae off glass aquariums. The stainless steel scraper is 3″ wide and angled to give you the perfect leverage against the most stubborn algaes. Rotational Polisher Removes algae off glass or acrylic aquariums with a convenient head that rotates to reach hard-to-clean areas. Gravel Shovel The perfect tool to sift sand or gravel without getting your hands wet. Easily remove empty snail shells or other debris out of the aquarium.