The Dewalt Tungsten carbide tipped reversible planer blades are available in the following range:
Sizes: 80mm or 82mm.
Pack: 1 Pair.
The Dewalt DEWDT3901QZ TCT reversible planer blades (pack of 2) are 82mm. These blades are for use with the following Dewalt planers:
DW677
DW678K
DW678EK
DW680K