WOODYS Indexing Tool 463628The edges of square single support plates must run parallel to the edge of the track. Use Woodys square indexing tools, available for 5 16? Digger and Grand Digger support plates, to get the job done. Triangle support plates are marked with a dot, which must face the direction the track is rotating. This can be done with Woodys indexing tool for Triangle Digger support plates. All of Woodys indexing tools fit on a standard 3 8? ratchet.