I claim the ornamental design for a tree- or pole-mountable device with removable, extendable arms for training vines, as shown and described.
FIG. 1 is a perspective view of a tree- or pole-mountable device with removable, extendable arms for training vines showing my new design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is an elevational view of the opposing side thereof;
FIG. 4 is a top plan view thereof, the bottom plan view being a mirror image thereof; and,
FIG. 5 is a reduced perspective view showing the tree- or pole-mountable device with removable, extendable arms for training vines in use; the phantom lines depict environmental structure for illustrative purposes only and form no part of the claimed design.