Fein's unique caulking cutter removes sealant, caulking and glazing putty quickly and cleanly. This heavy duty tool oscillates 4 degrees at 18,500 strokes per minute. The tool does all the work. You just guide it. Blades fit onto a shaft for efficient power transmission and exact positioning. Includes: FSC 2.0 Variable Speed Tool With Handle 5-Pack of 63903117015 Blade Single 63903116011 Blade Wrench Metal Carrying Case Specifications, Model: FSC 2.0 -SC, Input Watts: 400, Output Watts: 220, Blade Oscillations: 11,000 -18,500min Power Cord Length: 15 feet, Net Weight: 3.2 lbs with handle.