Tajima SLT-AL200M Slant 200M Rotary Dual-Scale Angle Meter with Magnetic Base Quickly measure, verify or repliacte an angle or rise Simple, one-hand operation with a large thumb-screw positioned on the handle Big, easy-to-read scales rotate and align using a large bubble vial Ideal for civil engineering, construction, plumbing, and more With handy conversion charts and graphics