Rockwell RK5131K 3.5A Sonicrafter F30 Kit with Hyper Lock and Universal Fit System, 32-Piece The all new RK5131K Sonicrafter features 4 degrees of oscillation for fast cutting and variable speed for precise control The 3.5 amp tool offers significant power while the Universal Fit System and Hyperlock make it easy to change accessories The Sonicrafter uses a universal accessory interface to allow you to use accessories from a multitude of manufacturers Universal Fit System accepts other brand accessories Hyper lock Tool-Less Blade Change - 1TON clamping force prevents blade slippage Constant Speed Control for maintaining speed-of-cut under load Vibrafree Counterweight offsets vibration for smooth cutting Variable Speed Dial for precision control