Stabila 16" Heavy Duty Professional Type 196 Builders Level with 5-Pocket Case Crystal clear vials readable in any direction with no change in accuracy tolerance. Locked vial system, no recalibration needed / Metal Hang hole for storing level on site. Removable rubber end caps for scribing in corners and for reading tight header and sill openings. One rubberized hand holds for comfort and grip Vials accuracy is guaranteed for life / 16" version has one Horizontal Level and one Vertical vial