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About Northern ToolNorthern Tool & Equipment Company is a multi-channel supplier of high quality products to do-it-yourselfers and businesses including automotive shops, grounds maintenance professionals, contractors and others for over 22 years. With 43 stores in 10 states and a strong Web presence, Northern is the ultimate resource for generators, small engines, pressure washers, hand, air and power tools, hydraulics, pumps, trailer parts, seasonal equipment, automotive supplies, NorTrac tractors, and much more. Visit the company on the Web at www.northerntool.com.

Power-to-weight ratio. Ask a tradesperson for an opinion about a power tool and you''re likely to hear how powerful it is for its weight. Most of us want as much power as we can get for the weight we carry. It''s easy to feel the difference between the most powerful and the least powerful drills, but it''s harder to judge power in relation to weight. I calculated power-to-weight ratios by dividing each tool''s torque rating by its weight. That allowed me to compare drills on the basis of inch-pounds of torque per pound of weight. I used the manufacturer''s torque specs but weighed the tools myself.