The Taurus website describes the judge as:
The "Taurus Judge® " is so named because of the number of judges who carry it into the courtroom for their protection. Capable of chambering both .410 2-1/2" shotshell and .45 Colt Ammunition, this amazing combo gun is ideal for short distances - where most altercations occur, or longer distances with the .45 Colt ammo. We have finely tuned the rifling to spread the shot pattern at close quarters or to guide the .45 cal. bullet to the target. Fully customized with fixed rear sights, fiber optic front sights and Taurus Ribber Grips®, the "Taurus Judge" is one decision-maker that lays down the law.
Now I don't know if a "number" of judges really carry these in the courtroom or not, but the pistol is very unique and interesting. Other pistols have been chambered in .410/.45 Colt before, such as the Austrian Super Comanche single shot that was produced quite a few years back, the Magnum Research BFR (Big Frikken Revolver), Thompson Center single shot, and the Bond Arms derringers. Taurus has refined the idea and put it into a concealable five-shot package.
Taurus makes quite a few different versions of the Judge. They make it in just about any combination of finish, material, chamber length, and barrel length. You can get them in Ultra-Lite (aluminum, not titanium), blued steel, or stainless steel. You can get the Ultra-Lite in a stainless finish or blued. You can get a Judge that will chamber 2-1/2" shells or the "Magnum" that will handle 3" shells. You can get barrel lengths of 3 inch, 4 inch, or 6-1/2 inch. They also make a "Limited Edition" with a polished stainless steel finish and gold accents on the trigger, hammer, and cylinder release. I have also seen models with bobbed hammers and/or unfluted cylinders. Recently I saw a new model at a local gunshop called the "Public Defender" which had a smaller grip, bobbed hammer and a shorter 2 inch barrel.
For this review, I used the model 4510 in stainless steel, with a 2-1/2" chamber and 3" barrel. I have previously owned an Ultra-Lite model with the same dimensions and the stainless steel finish. It was considerably lighter than the all stainless piece I have now. It still had a stainless steel cylinder and barrel insert, but had an aluminum frame. The reason I traded it for the all stainless model was because the aluminum frame was so soft that I had issues with it. The cylinder "star" would scrape material off the frame when you would close the cylinder, and the cylinder "stop" that the cylinder stops against when fully open actually split open away from the frame. So if you are considering which material, I would steer you toward the all stainless models.