-Out Tool, Voltage 18 V, Max. Speed 32,000 RPM, Collet Size 1/8 in, 1/4 in, Adjustable Depth Guide Yes, Brushless Motor Yes, Cordless Tool Kit Contents (1) Bare Tool, Safety Features Electric Brake, Spindle Lock Yes, Built-In Light Yes, Features 1/4 in and 1/8 in Bit Capacity, LED Light, On Board Bit Change Capabilities Eliminates Need for Wrench, Slide Switch with Lock-On, Handle Type Barrel Grip, Lock-On Switch Yes, Power Source Cordless, Number of Batteries Included 0, Battery Series LXT