Empire Levels combines durability and accuracy with its 48 in. True Blue EM71.48 Series Box Level. Its blue vials offer superior readability, and are accurate to within 0.0005 per inch in all 10 level and plumb working positions. Its Rare Earth magnets hold onto ferrous surfaces, while its rubber hand grips add comfort for users. And the dual-molded, shock-absorbing rubber endcaps ensure it will endure any home or professional project.