The Bosch GOP40-30C StarlockPlus Oscillating Multi-Tool Kit includes a tool that has the Starlock next-generation 3-D tool-accessory interface, which produces best-in-class accessory grip, making it the new professional standard in oscillating tool performance. With more contact surface area between the tool and accessory, the Starlock interface is a cupped 3-D tool-accessory connection that delivers greater torque transfer for an expanded work capacity. The no-touch blade-change system makes it easy to attach, remove or reposition blades. The professional-grade 4.0 Amp motor delivers a top speed of up to 20,000 oscillations per minute, and the tool provides a 3.0 Amp oscillating arc.