The Focus “Tritok” are their new 3-piece classic style DE razors in either aluminum or stainless steel, with each model Tritok’s head, registry pins, and threaded screw obtained from a single block of aluminum/steel, laser-excavated until reduced to this size. This R53-5 is the red anodized aluminum version of the #53 slanted-head model, made with different -X suffixes for different colors.
Focus produces 3 head geometries in their new Tritoks, and in their telling the FLAT R51 head is “for a ‘soft shave'”, the CONCAVE R52 head “…for a little more aggressive shave”, and this SLANTED R53 head “…for a most aggressive shave”.
One free opinion from many uses, however, is that the Concave #52 is actually clearly the aggression king here (and an aggro model it is indeed!), definitely not this slanted model with its action quite mild & comparable to the flat-headed #51. This is a mild razor, with the teensiest bit of extra in the gas pedal that you can get, and frankly after using many times, the only place on my face I can say I can do things w/ the 53 that I might not be able to achieve with the 51 (or for that matter 52) is upon my chin, where for some reason this Slant Tritok does indeed act as a “mildly special” shaver; maybe I should keep him around w/ the straight razor just for that spot because this razor is the best shaving on the tip of my chin razor I’ve ever used, I just don’t care much about that spot because the skin never acts in ways that allow the beard to point at skin (this happens all the time elsewhere, and always first at the 10/10 difficulty corners of the mouth).
If you’ve been using/liking other slanted head DEs and hope this R53 gives similar action/feeling, you’ll not likely be happy buying and using the R53; this razor (indeed all three Tritoks) are so odd in approach that they must be compared to themselves (due their outrageously low 25° setting with no bending of the blade). Remember to keep the whole plane flush whenever geometrically possible.