Check the listing for details. Drill and Grommet Set - Turn Any Lid Into a Fermentation Lid. Condition: New. Listed at 12.99 USD. Turn your lids into fermentation caps!DRILL BIT WITH GROMMETS: You will receive one 6” drill bit with 12 grommetsTURN YOUR LIDS INTO FERMENTATION CAPS: With these two pieces you can turn your typical plastic lids into fermentation caps – simply drill the hole into your lid and insert the grommet into the hole, now use the airlock of your choice and ferment all your favorites. You can now easily turn your different containers into fermentation vessels! Work perfectly on Big Box Store BucketsPERFECTLY SIZED: We sourced a drill bit that creates the exact size hole needed for your fermentation grommets to securely hold your airlock or other insert in placePREMIUM MATERIALS: Our drill bit is made of steel and coated with a shining black paint for a smoother surface to the touch. Each grommet is made from food-safe sturdy, durable rubber that can last a lifetime of brews when properly cared forWIDE RANGE OF USES: Once you have drilled your lid and inserted the grommet, the uses are endless: insert an airlock and begin brewing homemade beer, wine, mead, cider, or even sauerkraut, kimchi, and pickles! Use a straw through the grommet hole and now you have your new favorite drinking cup. A versatile addition to your brewing supplies