Features strong magnets in the milled measuring surface for a secure hold on steel surfaces.
This spirit level can be used in the overhead position by turning the level upside down. In this 'transfer position' you can then precisely measure from underneath.
Features one horizontal and one vertical vial; accurate to 0.5mm per metre (0.029° = 0.5mm/m) in normal working position and 0.75mm per metre (0.043° = 0.75mm/m) in overhead position.
250mm/10" length makes the 81SM a particular favourite of scaffolders and steel erectors.
Vials are guaranteed to remain accurate for 10 years.
