These Stanley FatMax heavy-duty box levels are machine milled on two sides to ensure accuracy 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 work piece The dual bi-material grips are ideal for carrying and vertical levelling and the levels have shock absorbing end caps for longer life FaxMax levels have an accuracy of ±05mmm on one face and ± 07mmm on the other which is covered under a 5 year accuracy guarantee The levels in this range are 6mm taller than most competitors 6-9mm wider than other levels and are heaviest in their class providing ultimate strength and durability