The Kapro 771 TWIN Mini Level with hang-style end cap and carabiner, provides added safety when working at heights as well as keeping it within easy reach at all times. Its V-groove and Rare Earth magnetic base, makes it the perfect choice for leveling pipes and various materials with ease and precision. Shockproof end caps protect the level and absorb hammer/mallet blows. Specifications: Size: 10cm.Accuracy: 0.5mm/m (0.0005 in/in) .