Kett metal shears are the standard in the business, if you are using another brand chances are you are still probably using a Kett head and shear blades. One problem with most metal shears however is it can be difficult to make tight radius cuts or work with corrugated metals. The new Kett Profile Shears KD-446 ($265, Ohio Power Tool) uses a different style head specifically designed to be more maneuverable while cutting. Find out more about this product.