T Post to 2x4 Adapter

Yes, urethane is incredibly strong and will hold up to weather for many years.

No, it has a taper built in so it clamps the t post and fills the 2x4 receiver more as you insert it into the receiver. This locks it in for a nice movement free grip with no tools needed.

No, these are actually much tighter than using a 2x4 because the design includes a taper lock that eliminates any excess play for a tight grip on the t post.