These 14 gauge square sign post have 7/16” holes on 1” centers the full length of the post allowing signs to be mounted back to back on all 4 sides at any height. The square post provides exceptional torsional stability. Can be used alone or with 3 foot 12 gauge base post. Please call 1.800.443.7103 and place your order by phone for all post orders with a quantity of fifty (50) post or more for cheaper freight cost!