Empire E255IM heavy duty professional combination square is Ideal for trim and finish carpentry in close spaces, this model has a 6" stainless steel blade that makes it easy to mark 90-Degree and 45-Degree angles accurately and to measure and check depth. Features include a true blue vial for accuracy, machined square head, hardened scriber, and -Inch / metric graduations. Empire Level is the leading designer and producer of levels, squares, layout tools and caution tape in the United States with dominant market share in the retail, contractor supply, and Do-It-Yourself markets.