4-4 point low approach one-space low pincer, attach wrong side
is somewhat like a hamete, and is played when Black has an extension at or similar, and the left side has lower value. By exploiting Black's fear of crosscut, aims to make Black's wall face the wrong direction. Note that if is played at a, then Black would have blocked at (cf., 4-4 point one-space low pincer invasion, block), so White tries to preempt this outcome.
Usually White's desired outcome is for Black to play submissively at . Then to is joseki (cf., 4-4 point one-space low pincer invasion, interception), but Black's wall faces downwards instead of rightwards, and is in an awkward position.
Actually, Black can hane at the 3-3 point. If crosscuts, then descends. This reverts to 4-4 point low approach one-space low pincer, attach and crosscut, and the stone should help Black in the subsequent fight.
So can choose to pull back and avoid a fight. So connects and keeps the corner, while makes a two-space extension. Now can choose to immobilize the stone at a or to attack the White group at b. In most situations, this result entails a local loss for White, so this variation is at least playable for Black.