I have been using this product for years but needed more as I lost 1/4 inch down the middle. The 1/4" center was very tight and required additional work on the drilled hole to fit the dowel center into the 1/4" hole. This is a great product, true center point, but my previous ones were easier to insert. Maybe I can grind down the diameter to make it a better fit. I'll try this option and we'll see.