The Square Pile Guide is used as an internal pile guide. 
Measure your piling and order the next size up.
A 14-inch piling uses a 16-inch piling hoop. 
Available in 12, 14, 16, and 18-inch sizes. 
It is designed to be fastened with 1/2-inch
carriage bolts and to be used with lumber
from 1-1/2 to 2-1/2 inches thick.