This kit of 2 Aluminum brackets includes the self drilling screws to fasten these brackets to a Slipfence Aluminum post,( SF2-PK309, 310, 312 - SOLD SEPERATELY) and also the wood screws to fasten the 2"x4" wood rail to these brackets. The purpose of this kit is to use Aluminum posts for your fence but reduce the cost of the railsl by using regular 2"x4" wood rails instead of aluminum rails.