Comments about Gibraltar Metal Tension Rod Washers (12-Pack):
I've replaced drum heads on three complete kits recently so far. I've encountered missing washers as well as well as washers that don't fit quite right and interfere. (You can't find this exact needed size at your local big box hardware.) Its hard enough to tune drums absolutely correctly without having to compensate for this kind of handicap. The right washers do smooth the effort.
Bottom Line Yes, I would recommend this to a friend