From the Manufacturer: Hardiplank and Hardipanel are becoming a household name with the building contractor. Cutting these materials efficiently while keeping the dust a minimum has been a challenge for tooling manufacturers. The CMT blade offers smooth cuts and reduces dust while keeping a sharp edge. • Best Choice for Hardiplank and Hardipanel and other brands of Fiber Cement board • 7-1/4" (188mm) diameter with 5/8" arboor hole with diamond knock out • 4 DP (polycrystaline diamond) teeth • Molded Blade case included for protection • Top Quality European product