The levels in the Stanley FatMax heavy-duty box level range are machine milled on two sides to ensure accuracy on both sides, and have improved vial views for ease of use. The large centre vial is bridged to allow a continuous line to be marked on the workpiece. The dual bi-material grips are ideal for carrying and vertical levelling, and there are shock-absorbing end caps for longer life. FatMax levels have an accuracy of +/- 0.5 mm/m on one face and +/- 0.7 mm/m on the other, which is covered under a five-year accuracy guarantee. The levels in the Stanley FatMax heavy-duty box level range are 6 mm taller and 6-9 mm wider than most other levels, and are also the heaviest in the relevant class, providing ultimate strength and durability. The Stanley STA 1-43-548 FatMax level is 1,200 mm (48 inches) long. Note: It has 3 holes on the top which acts as a shock absorber system.