Magnetic Centering Head with Vial, 6 in and Larger Pipe Capacity, Medium ORS NASCO making it perfect for any making it perfect for any application that requires maximum torque Constructed of high grade heat treated alloy steel for maximum toughness and durability Anchor Brand Catalog YES Arbor Diam [Nom] 5 8 in 11 Arbor Thread TPI or Pitch 5 8 in 11 Big Catalog YES Brand ANCHOR BRAND Bristle Diam 0 One piece Y shaped body design with magnetic legs Built in dial with 2 1 2° increments that turns 360° Hardened center punch marks set position by taping with a hammer Used to establish and mark a centerline at any angle around circumference on a pipe or tank or as a protractor level Excessive heat can damage magnets