This Stanley STA043609 FatMax XTREME is a precision-engineered for super precise measuring. This hand tool can be used by professionals and home DIY users and is perfect for any task. The outer two viles have a full 180 degree rotating vile and are circular in shape making it perfect for measuring rounded surfaces. The central vile is magnified and is 20% larger than standard giving it a clearer reading. Supplied as a single unit. A 250mm Stanley FatMax ¾ Xtreme Torpedo Level with three vials. This level has a V-groove machined in the magnetic base for firmly fitting on pipework. It is ideal for use when installing machinery, air conditioning ducting and shelving.