Stabila 38672-72-Inch builders level, Magnetic, High Strength Frame, Accuracy Certified Professional Level Strongest Magnets, flush mounted - Work Hands-Free. Spring steel hairline indicators inside the vials. Certified Level Accuracy in top read position: 1/32" over 72". Levels 59" and longer have a bridge over the horizontal vial for uninterrupted scribing and increased frame strength. Patented, epoxy-locked vials never need adjusting.