Hullsag for 20mm dollier

Ideal for cutting or scoring through a coating or substrate to isolate a specific diameter test area for adhesion testing. Test area isolation (if required) Use a 14, 20, or 50 mm hole saw to cut or score through coatings around the edges of a dolly (pull stub) to isolate a specified diameter test area and remove excess glue. NOTE: For coatings with strong lateral bonding, it is recommended to cut completely through the coating down to the substrate. Testing concrete repairs and overlays in accordance with ASTM C1583 Use the 50 mm diamond-impregnated hole saw to drill a circular cut perpendicular to the surface to a depth of at least 10 mm (0.5 inches)