These are 18 mm in diameter by 175mm in length dried oak pegs. We are oak framers ourselves and use these on our own jobs, they are hexagonal making them perfect for this kind of work. (These are a pack of 50) They’ll fit a 18 mm auger hole. Message me for enquirers, questions or if you’d like them made to specific lengths or sizes. I can make them to order.
eBay