HUT2000 Features: -The only 2-Cylinder, common piston straightline with vertically-engaged, twin-drive gears. -Lack of ''rolling gears'' common to all other straightlines eliminates ''humping and jumping'' at the end of each reciprocal stroke. -Two in-line cylinders, micro-honed to eliminate cylinder-wall drag, power an oversized high-alloy piston. -Double rack and pinion gear assemblies give twice-normal gear contact for maximum balance and thrust. Product Type: -Straight Line Sander. Dimensions: Overall Height - Top to Bottom: -3.4 Inches. Overall Width - Side to Side: -6.4 Inches. Overall Depth - Front to Back: -17.1 Inches. Overall Product Weight: -7.05 Pounds.