A: These blades are of excellent quality and I assume you refer to the DeWalt Cordless Jigsaw. The DeWalt Jigsaw uses T-shank blades however you need to check your specific model to be sure.
A: No you need a jigsaw
A: First, is your jig-saw a T-Shank user? If yes, then any brand T-Shank blade will work. "T shank" is the shape of the blade end, that's the part the saw holds the blade. Hope this helps to understand how the blade is held in place while using your saw. Otherwise you may need a U shape blade?
A: yes easily install and works great
A: Hi John! Yes, these blades will work with the DeWalt cordless jigsaw.