Both fixed and plunge base and you've got the best of both worlds in this router. Automatic electronic adjustments within the tool adjust to the load placed on the bit so that the motor last longer. Variable speed allows you to customize your work based on your materials and desired results. Electronic feedback control allows the tool to maintain set speeds under load, variable speed lets the user adjust the speed to suit the bit and the work piece, controlled start-up with the soft start, clear acrylic base to allow clear visibility, LED work light illuminates work area, Micro-depth adjustment on the fixed base provides precision, ergonomic soft grip handles for comfort and control, Chip shield keeps dust and chips away from the operator, 4-stage depth stop for stepped or repeated plunge cuts.