● Rulers are numbered from left to right and right to left for easy use. ● The measuring size can be recognized immediately without rotating the ruler nor re-calculating. ● 1/4" is intensively marked on each edge for quick alignment. ● Angle lines of 30°, 45°, and 60°are provided. Ideal for cutting blocks. ● Ideal for cutting half squares and quarter square triangles. ● The grids are clearly marked for easy alignment. ● Ruler scale is clear and durable.