Adjustable Hollow Mill heads. Anyone use them? Preferred brand?

[hammernanvil]

I saw someone using one and I’m curious about
them. I appreciate comments if you’ve used them.
If you like or prefer a particular brand I’d
like to know that too. Thanks.

[gunsmither]

I have several of them that I use fairly regularly on leaded steel parts I produce. They work great for what I do. Genessee brand are the ones I have. Quite pricey to buy new. Got mine on eBay
at a nice price. Search EBay for "Hollow Mill" ; usually a bunch of them show up. I use them on a Haas mill, as well as on a Hardinge or South Bend lathe.