12" Delux High Speed Blade. Size: 12" X.110 X 1" with a diamond depth is .440" (11mm) and degment height is .540" (14mm). This is a high quality general purpose blade that will work on concrete and asphalt. This blade has slant segments that extend down to help slow the process of blade core wear. For use on high speed , masonary and low HP walk behinds.