This level is exactly what pros have asked for and need. The STABILA R-type 300 level has been especially developed to withstand the toughest building site conditions. It has been designed to be extremely strong, lightweight, twist-resistant - through a five-chamber R profile and easy-to-use. It has an extra-wide measuring surface that prevents the level tipping over during use. This makes the R 300 unlike any other level you have ever used before. Today, this level represents the best level product that STABILA makes. Invest in the R beam and you set the tone on the site.