GreatNeck 10790 Supercede Torpedo LevelMayes 9" Magnetic V-Groove Torpedo Level 3 large acrylic high-visibility vials Magnetic V-groove for use on conduit and pipe Tapered ends slide easily into pockets without snagging Brass bound for durability and stabilityGreatNeck 10790 Supercede Torpedo Level Features:; Top reading magnetic V-groove; Supercedes the torpedo level; Powerful V-groove magnetic surface that self-aligns when used on pipe or conduit; Won"t flip-flop when used on corners like flat magnetic levels do; No cosmetic ends allows better balance when carried in pocket