The Dremel® 4300 is the first Dremel® rotary tool to allow tool-less and collet-less accessory changes with the inclusion of the three-jaw chuck. The chuck accepts all Dremel® accessory shank sizes for fast and convenient accessory changes without ever using a wrench. Featuring the all new Pivot Light, your projects are well-lit with an optimum line of sight since the light pivots to direct illumination where you want it. Experiencing the full range of Dremel® rotary tool applications is easier than ever because the 4300 offers our most powerful motor with built-in variable-speed and electronic feedback circuitry. And the slim, ergonomic body design provides a comfortable 360 deg grip zone no matter how you hold it for extended ease of use. The completely redesigned airflow system lets the Dremel® 4300 run cool, quiet and smooth so completing projects are more enjoyable than ever.