This 24-inch heavy-duty aluminum box level is built for professional contractors and serious DIYers. The machined gauging edge delivers accuracy of 0.029 degrees or 0.5mm/m in all positions, backed by a lifetime guarantee. The durable aluminum frame withstands jobsite abuse while the solid block acrylic vials resist impacts. Features Glo-View technology for easy reading in dim conditions, a glare-reducing painted top edge, and soft-touch ergonomic handgrips for comfortable use.