The Heavy Hellgrammites are my favorite and most productive smallmouth flies. I tied and tested many styles of hellgrammites before I settled for these. Fish them upstream dead drift in all of the deep pockets below the riffles or down and across stream with a slow six inch stripping action. We tie these in three colors because at various times the bass prefer a different color. We also catch many large browns and rainbows with these in the large trout river in the Rockies each year.