From a box circulate, tandem couples, or type III T-bones: Leaders Trail Off as trailers Cross Extend and Trade. Equals Hinge the Top (B. 1281 and B. 4153) and is equivalent to Trail & Peel (C-1).
Trail Across But -- as above except the trailers replace the Trade with a designated call. Equals Hinge the Lock (B. 1922) from box circulate.