Oldie but a goodie. First time I saw this one, it was very popular at a local gym. I was in high school at the time. Most were doing them with a pair of DB's and alternating reps , from right to left and back again. A few used a semi hammer grip (thumbs facing back) and lowered the DB to the center of the chest. Gives a different affect and focus on the triceps.
A lot of guys do the regular version, where the DB passes near the side of the head & ears, for a fuller stretch. Than when their 8 reps (or so) are finished..without stopping...continue with the version in the picture. A real extra focus on the triceps. Rather than touching the pecs, the DB is lowered to the forehead (something like a BB skull crusher), by some people.
Most Pl'ers use different styles of direct DB tricep work, at one time or another, in their training. Depending the health of the elbows.. Good Luck.