Electronic five-speed with soft start.  Precision machined aluminum motor housing and round base.  Features a 7" base diameter with a standard 1/2" collet.  Micrometer depth-of-cut control gives precise depth setting.  Split base construction provides rigidity and accuracy.  Self-releasing collet system frees bit from collet when loosened to prevent "frozen bits".  Standard Equipment: Motor, base, 1/2" collet, 2 collet wrenches, and operating manual