One Fit, 2-1/2", Japanese Precision HCS Blade, One Fit Arbor Ensure Proper Fit On Oscillating Tool, Flush Cut Design ToAllow The Operator To Lay The Blades Flat On Surfaces Perpendicular To The Cut, Constructed With High Carbon Steel, Fits Fein, Bosch, Makita, Dewalt, Rockwell, Porter Cable, Milwaukee & More Oscillating Tools, Adaptor Included To Fit Dremel Quick Release & Old Rockwell.