Precision Steel Square with Wide Base, Material Stainless Steel, Angle 90 Degrees , Number of Pieces 1, Outside Dimensions 2 31/32 in x 1 31/32 in, Case Included No, Construction Stainless Steel, Squareness - Inch 0.001 in, With Wide Base Yes 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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