I need to clean out the smallest portion of the Universal Hosel Bore in a set of iron heads. Can you tell me what the best bit size to do this job.
The bottom of the bore on the universal hosel bore is .353″. There is a small section that reduces the area from the .375 to the .353. An 11/32″ drill bit is .343 and is what you could use for the bottom of the bore. 23/64 is .359, so that is a little large to use. You can use the 11/32″ bit and move it around the cavity to get all the residue from the .353 cavity.