CPW does not endorses the use of  cylinder style locksets, shown below, due to the tighter swing tolerances that can result in seasonal expansion and contraction issues. The gates may swell in the winter to where they wedge against your post or jamb, and require the sort of repeated urging that can undermines the joinery. We will be more than happy to bore for such a lock, if you are insistent, but our liability for the gate itself must end when it leaves the shop.