The Rockwell Universal Fit 1-3/4 Bi-Metal Oscillating Tool Blade features a precision-ground, beveled tooth design for plunge cuts up to 1-7/8. Includes free spacer for Bosch & Dremel and Universal Upgrade Ring for Original Sonicrafter hex interface models. Bi-metal with hardened teeth to cut non-ferrous metals. Universal accessory fits all tools.