Rockwell RK5151K 4.2 Amp Sonicrafter F80 Oscillating Multi-Tool with Duotech Oscillation Angle Technology. 12 Piece Kit includes 10 Accessories, Carrying Bag, and Oscillating Tool Duotech oscillation technology lets you select the optimum oscillation angle for power and precision Variable speed dial for precision control  from 10,000 to 19,000 oscillations per minute Powerful 4.2 Amp motor delivers constant speed and wont stall under heavy loads Hyperlock tool-free blade change system provides 1 ton of clamping force prevents slipping during use, no matter the blade angle Universal Fit System accepts all major brands of blades, sanders, and other accessories