From Cannon- With 16 locking points, this base allows for 360° downrigger rotation with locking positions every 22.5°. Composite components and stainless steel construction make the standard model as strong as it is versatile. 16-point 360° swivel base that locks every 22. 5° for 360 downrigger rotation,Composite components and stainless steel construction make the standard model as strong as it is versatile,Pre-drilled and tapped for easy installationLow profile design maximizes available space