I ordered two vertical address number signs to mount on either side of my mailbox post which has an 8 inch wide vinyl cover over a 4X4 post. This cover has an offset hole which positions over the front (street side) of the 4X4. I ordered the signs with the numbers centered so I could keep the mounting holes to the front of the sign so the screws would engage the 4X4, one on either side. SmartSign centered the numbers on the same side of each sign (these are double sided signs) rather than both sides of the sign therefore the mounting holes are towards the leading edge of each sign. When one of the signs is positioned for mounting, the holes are actually towards the rear of the post causing the mounting hardware to miss the underlying 4X4 post completely. The signs are 6 inches wide, the post less than 4. SmartSign offered a 10 percent discount over a month ago but I haven't received it.