Squares are available in grades 0 or 1, grade 1 being perfect for most general use. The better 0 grade squares are typically used in applications where a higher grade of accuracy is required, in a toolroom for example, or for checking other squares for square, or for making jigs and fixtures where supreme accuracy is needed. Squares (despite their name) are available in different angles: 45 degree squares, 60 degree squares, 90 degree squares, 120 degree squares & degree squares. Types of squares include toolmakers squares, machinists squares, granite squares, flat bottom squares and bevel edge squares. Buy now for best delivery and price.