Damaged edge of level. The central bubble is smaller than the graduated lines, making it difficult to interpret how far you have deviated from the plane. Since there is a range, the bubble must be as long as the range.
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Johnson Level & Tool 40-0912 Self-Leveling Cross-Line Laser Level, Red, 6 x 7 Inches
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π 60MM High Precision Horizontal Bubble Cardan Level for Accurate Measurements
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