The SkyScrapers were developed to meet specific needs of airframe manufacturers. They not only aide in the removal of large amounts of sealants and adhesives but do it without scratching substrates or painted surfaces. In addition they can be sharpened with the SkyMill up to 40 times which makes them extremely inexpensive. These 6mm Thick – 3mm Wide Amber scrapers are for exterior surfaces. They are also listed and approved by Airbus.