Hollow Three-Square Scrapers Scrapers are ideal for cleaning, smoothing and deburring metals and plastics. Use to prepare surfaces for soldering, remove excess solders, open bezels, and more. Sharp from handle to tip and can be resharpened on a bench stone. Securely mounted to hardwood handles. Hollow three-square scrapers are high-quality, chrome alloy steel. Available in 2" and 3" blade lengths.