1/2HP dual-speed induction motor with smooth performance and steady torque at both low and high speed. Slow speed is ideal for sharpening edges of woodworking tools, high speed is ideal for quick metal removal Includes 80 grit and 120 grit white aluminum oxide wheel which can reduce heat build-up Two pieces of cast aluminum tool rests can independently adjustable to compensate for wheel wear and to achieve different angles Sturdy cast iron base with mounting holes prevents wobbling and walking A buffing wheel is provided for multipurpose polishing;It can be also installed with 8"x1"x 5/8"wide x 5/8"shaft size brush wheel BUCKTOOL 8-Inch Low/High Dual Speed Bench Grinder Professional Power Tools Cast Iron Base TDS-200DS