i started with the 3/8s bushings because the holes were exactly 3/8. well they slid out, but the pegs held them in causing the grovers 97/18s to turn tight. so i remeasured in both inches and mm with my calipers. the holes are actually 9.90 mm which made them a perfect fit for the 10.5mm and i installed them. PERFECT fit using a bushing press and the tuners are fluid and great.
moral of the story: measure in both inches and metric, and make sure your holes are slightly smaller than the bushings.
thanks to SM for fast shipping, they are THE go to site for tough guitar issues.

I recently bought a Gibson ES-330 VOS model and was not thrilled with the screw-in tuner bushings. They looked relatively cheap and just not "period-correct". When I went about looking for different tuners, I contacted Stew-Mac and they suggested these. I LOVE THEM! They fit perfectly in my guitar and look great to boot.

Used these on an Indonesian made Squire Strat when replacing stock tuning keys. These did not require pressing on my application. The holes in the peg head varied slightly but were all close to 10.5 mm to begin with. In cases where the holes were slightly larger, I could use a super thin toothpick shim and/or some tacky glue. These worked quite well for me.

A little soap as lubricant and they pressed right in - a perfect way to dress up my modern-headstock guitar with classy open-back tuners (Golden Age Restoration).

A basic product that works well and is very useful for fitting vintage tuners to modem tuner holes. Far easier than plugging and redrilling!

Worked as they should and look great,well made.

Work as they should.

I bought these so I could fit vintage style Kluson style tuners on my modern strat. They fit nice and snug in the modern tuner holes and allowed for a clean install. I will be ordering these again in the future.

I use these about 50% of the time, especially when adding vintage style (or equivalent) tuners on some necks that are predrilled with larger diameter holes for some modern type tuners. They usually press-fit in very nicely depending on the holes you get like on some Chinese necks.
Now, what to do with all the leftover 11/32 dia. original bushings that are accumulating?

I love how they were 10.5mm for my MIM neck which has 10mm holes. I was able to press these busing in with a C clamp for a super secure tight fit. Excellent product and extremely fast shipping.