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Four steel poles with four linear ball bearings ensure stable, accurate, and vibration-free cutting Large dimensional lumber capacity: 2 x 12 at 90 degrees and 2 x 8 at 45 degrees Double sliding mechanism for lighter, more compact design, weighs only 27.6 pounds Powerful 10 AMP motor delivers 6,000 RPM 9 positive stops at 15, 22.5, 30, 45 degrees right and 0 degrees for most common miter cuts