The DEWALT DT3901 TCT Reversible Planer Blades with tungsten carbide tips.
Supplied as a pack of 2.
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 and DW680K.