Ray Foster F035 - Ray Foster precision high speed automatic spindle is designed for heavy duty, continuous operation. Quiet and smooth running, it permits tool changes in seconds without stopping the motor. A simple turn of the handle disengages the clutch, stops the tool from rotating, and opens the collet to allow the tool to be removed and a new tool installed. Now available to fit most brands of alloy grinder as replacement or upgrade, including Demco, Whip Mix, and CF Price.