Built with the tradesman in mind, the OX Trade Series I-Beam Levels are designed to be rugged, dependable, and accurate. Built with dense aluminum, the level is tough and stands up to the rigors of any jobsite. The aluminum body houses three protected vials, one vial set for level, plumb, and 45 degrees. To protect those vials, the end caps of the levels are made from shock absorbing rubber. The end caps stop bumps, drops, or shocks from affecting the vials 0. 0005″/ 1″ or . 5mm/ m accuracy. It also features a long magnetic strip along the bottom of the level for easy hands-free leveling or quick storage. ABS plastic handles make the level comfortable and convenient to transport around the jobsite.