Very convenient for measuring ratio with 45˚ compatibility Pipes can be measured using the measuring reference surface with the V shaped groove Imbedded shackle for drop prevention cord use Being phosphorescent, the device draws on light from well-lit places to emit light for a few minutes in darker applications Super strength magnet! Convenient when working with steel framing etc. SUPER STRENGTH SPECIFICATIONS Hardened extruded Aluminium alloy Alumite clear painted finish Pipe measuring functionality Magnet: 1 6-line acrylic horizontal air bubble tubes 4-line acrylic vertical 45˚ air bubble tubes SENSITIVITY / ACCURACY Sensitivity 0.35mm/m=0.0201˚ Accuracy: Within ±1.00mm/m±0.0573˚