I just spent an hour going through the stock of a local fitness company. The Body Solid kettlebells are really well-finished - not quite as smooth as the picture makes it out to be, but close (!) and quite a bit smoother and better finished than the GoFit, Cap, Troy, Apollo, and Powermax bells I looked at recently. I found several that I could buy and never bother to touch up the handles, in fact. They're almost as smooth as most epoxy coated kettlebells.
The handles graduate in size somewhat, but are roughly 1 3/8" or 35 mm through most of the range (appx. 20 - 50 pounds), and a bit smaller below that and a bit larger above. Space inside the handle is a bit under 3", but measurements were hard to get very accurately with a tape measure. Suffice it to say that handle diameters are sufficiently beefy, and space is certainly mainline.
The paint on all the examples I saw, except one oddball, was shiny black. Body Solid describes it as enamel, though the dealer insisted it was powder coat. It scratches white, and some on the rack showed some scratches like this. I actually preferred the matte finish on the oddball, but the dealer insisted that all new ones are the shiny black.
I like them, and they're well-priced. The only problem - for me - is that I prefer kettlebells in conventional kilo weights, as virtually every book, video, training regime, article, etc. that you read on kettlebells uses kilos (standards weights start with 4kg and go up in 4kg increments). Pound weight is a non-issue for the 35 pounder, as it's only 3 ounces different than a 16 kilo bell. The 55 pounder, however is 2.2 pounds heavier than a 24. Body Solid doesn't make bells above 75 pounds. All competition bells, should you develop that interest, are in standard kilogram weight progressions as well.