All New!! These are the knobs sold with the Rebel 17 Tumbler. We now offer them to replace the wing nuts for the Thumler's Tumbler Model B. They are sold in a pack of 6 knobs. Both tumblers require 6 knobs to secure the lid. Thumler's size is 1/4-20 female thread and the Rebel size is 6mm-1 female thread. Make sure you select the correct thread you desire. These are free spinning fluted anti vibration knobs.