Please note you can use both blades for the Compact Jobsite Table Saw DWE7485. 

Find below the specifications for each one: 

• DWA181424 / DWA181424B10 (8-1/4” 24T): 1.60mm plate / 2.40mm kerf
• DWA181440 (8-1/4” 40T): 1.64mm plate / 2.40mm kerf

NOTE: Different types of blades make different kerfs (width of cuts). Therefore, it is necessary to check adjustment of rip scale when changing blades. Replacement blade MUST not exceed the thickness stated on the riving knife. The riving knife provided with the saw is .087" (2.2 mm) thick.