One Fit, 1-3/4", Universal, Bi-Metal Tin Storm Blade, One Fit Arbor Ensures Proper Fit On Oscillating Tool, Cut Anything From Wood To Decking Screws Including PVC, Fits Fein, Bosch, Makita, Dewalt, Rockwell, Porter Cable, Milwaukee & More Oscillating Tools, Adaptor Included To Fit Dremel Quick Release & Old Rockwell.