STANLEY 42-465, CAST ALUMINUM MAGNETIC TORPEDO LEVEL, 9" HEAVY-DUTY, CAST ALUMINUM FRAME. VIALS PROVIDE ACCURACY OF 0.002 IN/IN (2MM/M). CENTER TOP READ VIAL FOR IMPROVED VISIBILITY. MAGNETIC STRIP TO ALLOW FOR HANDS FREE OPERATION ON METAL SURFACES. PIPE GROOVE FOR USE ON ROUNDED SURFACES.