Cutting sheet metal with shears or a grinder is messy and tiring. This Metabo HPT (formerly Hitachi) nibbler makes it clean and easy. It's a powerful 3.5-amp tool that punches through 16-gauge mild steel, aluminum, copper, and even corrugated metal at a speed of about 5.7 feet per minute. The downward punching action means the chips fall away, leaving a clean edge on your workpiece. It has a 3-position die holder so you can quickly change cutting direction for curves or intricate shapes. The grip is small and comfortable for great control, and there's a safety slide switch. A professional-grade tool for metalworkers, HVAC pros, or serious DIYers working on cars, roofing, or fabrication.