The Bosch GOP12V-28N 12 V Max Starlock® Oscillating Multi-Tool features the Starlock® next-generation 3-D tool-accessory interface. This cupped and contoured 3-D tool-accessory connection delivers greater torque transfer. The efficient 12 V Max EC Brushless motor delivers a top speed of up to 20,000 oscillations per minute, with great runtime. The tool has a 2.8° oscillating arc for outstanding productivity. A variable-speed dial allows the user to set the optimal speed for the task at hand. This light, ergonomic and compact tool reaches tight spaces. It utilizes the many Starlock® accessories to handle flush-cutting, plunge-cutting, sanding, grinding and more. It's an ideal tool to flush-cut doorjambs. This is a bare-tool kit – the battery and charger are sold separately.