Item is a return to Amazon and appears to have been used (there goes my faith in humanity).  DeWalt FlexVolt Carbide Wood Hole Saw Blade (5 1/4”).  Retails new for $83

Self-Feed Pilot Bit for fast, efficient cutting
Carbide Teeth for long life
Thin Kerf Design for high efficiency
DEWALT FLEXVOLT High Efficiency Accessories are engineered to maximize runtime
 

DEWALT DWAFV0514 FLEXVOLT Carbide Wood Hole Saw Blade, 5-1/4-Inch

SKU: 211480
C$28.00Price
GST/HST Included