Precision Steel Square, Material Stainless Steel, Angle 90 Degrees , Number of Pieces 1, Outside Dimensions 3 in x 2 3/8 in, Case Included No, Construction Hardened Steel, Squareness - Inch 0.0002 in, With Wide Base No Machinist's Squares are used in visual checks of parts for squareness and to position one item perpendicular to another. True 90 Degrees angles inside and outside. Beams and blades are lapped for straightness and parallelism. Blade length is measured from inner edge of beam to end of blade.
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