Standard Strength Anchor Helix.; 4,000 Ft Lbs ( 5,424 N-M), 10" (254 mm) Helix for use with 0.625" (15.9 mm) Rod. Installed with Chance anchor wrench C1021583. Anchor has curvilinear leading edges to help penetrate rocky soils and to reduce damage during installation. 5/8" threads to fit 5/8" diameter Pisa rod. Anchors are painted with a black paint.