Arm-roll from behind Uke

Key technical points:
1. Uke applies a hand-lock from behind of Tori when both are on the knees.
2. Tori comes with his hand over Ukes hand and locks it assuring good control of his elbow
3. Then he shifts his body to one side across Ukes knees and grabs his opposite leg
4. Then Tori rolls forward and across his shoulder brining Uke in a big circle over himself straight into Kesa-gatame.