Task Tools T58066 Heavy Duty Box Beam Level with Plumb Site, 48" 48-inch heavy duty box beam level with Plumb Site for easy and accurate checking of plumb Two solid acrylic vertical vials with a Plumb Site Dual-View vial; super-high accuracy of 0.0005-inch-per-inch Magnified horizontal solid acrylic vial for a clear view of bubble Two finely milled surfaces with V-Groove for pipe measurements Rubber shock-proof end caps; ergonomic bi-material handle for a comfortable grip