Dremel, Dual Interface Universal Flexible Scraper Blade. Universal dual interface directly fits all oscillating tools without the use of an adapter, *excluding StarLock, Compatible with Dremel, Bosch, Makita, Milwaukee, Rockwell, DeWalt, Fein, Porter Cable, Ridgid. Allows fast accessory changes. Used for removal of soft materials such as caulk in hard to reach areas. Make sure the blade is flexed during the scraping process. A 30 degree to 45 degree pitch is recommended.