The Empire 8" True Blue Billet Level Is Equipped High Strength Rare Earth Magnets That Deliver A Strong Hold To Metal Materials, A Vari-Pitch™ Vial Reads Pitch In 1/8", 1/4", 3/8", And 1/2" Per Foot Of Horizontal Run Of The Working Material, An Anodized Billet Frame Provides The Ultimate In Durability And Top V-Groove Ensures Stability When Using On Pipe And Threaded Rod, The Em71.8 Features E-Band(Tm) Vials Highlight The Meniscus Of The Bubble To Provide A Clear Reading That Are Proudly Made In The USA And Backed By A Limited Lifetime Warranty.