Vials display angles of 0 , 30, 45 and 90 Degree. No-dog feature. V-groove for pipe and conduit work. Power neodymium magnets for superior holding strength. No. 841.6: Length: 6 In., Material: Aluminum, Magnetic: Yes, Number of Vials: 4, Pkg Qty: 1, Package Type: Clamshell