STANLEY 43-511, SHOCK- MAGNETIC TORPEDO LEVEL, 9" HEAVY-DUTY ALUMINUM FRAME AND BI-MATERIAL BODY WITH SHOCK ABSORBING RUBBER ENDS FOR STRENGTH AND DURABILITY. VIALS PROVIDE ACCURACY OF 0.002 IN/IN (2MM/M). OPEN, TOP-READ VIAL PROVIDES MAXIMUM READABILITY. MAGNETIC STRIP TO ALLOW FOR HANDS-FREE OPERATION ON METAL SURFACES. LIGHTED VERSION WITH AUTO SHUTOFF IS DESIGNED FOR LOW-LIGHT LOCATIONS. PIPE GROOVE FOR USE ON ROUNDED SURFACES.