The DEWALT DT99593 FlexVolt XR HSS Wood Blades have been specially designed for fast cutting of hard wood, soft wood, hardboard, plasterboard, fibreboard and logs with a medium finish. DO NOT USE on masonry, concrete or metal. Their extreme runtime design enhances durability doubling the blades life span. Compatible with the DEWALT FlexVolt Alligator Saw 54 Volt. Can also be used with other DEWALT Models DWE397, DWE398 & DWE399.