Johnson Level &amp; Tool 1457-1000 10-Inch Magnetic Electronic Digital Torpedo Level<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Angle inclination in 3 construction languages - units of measure (degrees， percent， in/ft (fractional)</li><li>Self-calibrate and automatic digit inversion for overhead measurements</li><li>Reference function making any slope "0.0" and hold function locks measurement on the LCD</li><li>Super strong 10" solid aluminum frame</li><li>Powerful rare earth magnets hold to ferrous metal surfaces and V-groove frame fits on pipe and conduit</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31y2V0lIA9L.jpg" noproxy>