Review on Efficient Doweling Centering Woodworking Accessories for Precise Transfers by Tone Hatton

So I ordered a pack of 20 pieces and it looks as if the customer couldn't give me the right dimensions either, because I got about 10 mm instead of 3/8. hole or have a heck of a time to pull it out. The seller has communicated with me and it appears these are metric sizes which are "close enough" to imperial equivalents.