The Bosch GOP12V-28N 12V 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 12V 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.