I have a 30" wide version from Harbor Freight. Sheared, bent and rolled a lot of sheet metal over the past 3 years. the brand is KAKA? I hope not. I found that these guys need some set up to work properly: get your thickness gauges out and carefully set the gap between the blade and baseplate to 10% of the thickness of the sheet metal you are going to shear. Check the center carefully, mine has a bolt that allows tension to be added to keep the blade from bending. A little tricky to get that right. I shear steel and aluminum sheet from about .020 to .060 (aluminum only). with mine. The stop on the right side of mine was not installed at a 90% angle, that needed work. The rolls up top were not exactly smooth, had to work on those. and it is just a little tricky to do precise bends with the v notch. I found that putting a light BEHIND the tool while bending helped to get the sheet metal on the marks before committing to bend. Hope that helps. Your tool might be a better quality machine than mine, enjoy, it's great to be able to work sheet metal and mine has certainly paid for itself many times over.