The strongest level ever or your money back! A super strong level with all the features to make it durable, accurate and easy to use. The vials have a lifetime warranty and are individually calibrated to an accuracy of 0.005mm combined with 2 milled surfaces give peace of mind. Has a unique dual view wondows for vertcal vials that make for easy reading during use. Shockproof end caps and a 30mm depth extrusion give it ultimate strength.