The Empire em70.10 True Blue heavy duty torpedo levels features a tough all metal frame to stand up to tough jobsite conditions. High strength rare earth magnets deliver a strong hold to metal materials. The em70.10 also features a top ruler & pipe groove that is compatible with any straight edge to extend the working surface for measuring and scribing, while surface grip provides stability against any material. e-Band vials highlight the meniscus of the bubble to prove a clear reading at plumb, 45 and level. The em70.10 is proudly made in the USA at Empire Level in Mukwonago, WI & backed by a Limited Lifetime Warranty.