great condition acquired from University of California San Diego no accessories included 1in. oscillating action reduces friction heat to protect wood and prolong sleeve life Main spindle support runs on precision ball bearings and is oscillated by a heavy-duty worm and gear mechanism for consistent performance Oscillation gears run in a sealed lubricated box to prolong their life and durability Removable on/off safety switch prevents accidental start-up Spindles have threaded ends for quick, easy change