The bahco 466 m series magnetic levels have a unique design on the radius end caps fastening pins and convex radius and have eight rare earth magnetic two vertical plumb vials and one horizontal vial only 1 vertical vial on 400mm with and accuracy of 05 mm m the 17mm thick construction will not twist and these levels have a v groove at the bottom making these levels suitable for use with pipes machined surface on top and bottom anti shock rubber end caps laser edged centre zero measuring scale a