I've used various words in the title to keep international readers included, but I'll use the general UK usages of 'points' below,
Kato produce three different 'sizes' of points:
#6 | Left | Right |
#4 | Left | Right |
Compact (not shown above) | Left | Right |
There's also the Y point, and the Double crossover, and then three different crossing types.
You'll see that the business bit of the point on the #4 is shorter than the same bit on the #6. This gives it a sharper radius. A sharp radius is useful if you want squeeze a lot of trackwork into a smaller area, but looks less realistic. Some trains may not run as smoothly over a tight radius, particularly at speed.
The 'compact' points take a short radius to the extreme. They will only work with short-wheelbase locomotives and trams.
All the points have a built in solenoid motor to 'throw' the point blades. They can be switched manually with the small black lever on top.
DCC tips: https://wiringfordcc.com/switches_kato.htm
Double-crossover: This switch is long, 310mm, and has two parallel
tracks with Kato’s standard double-track offset of 33mm and four
switches controlled by a single electrical input. All four switches are
either lined for straight or for crossings.
The switch has
another quirk: not only are the two mains insulated from each other, but
each switch on the same track is insulated from the other (on the same
rail). Thus, if you put this element on a track that isn’t a loop, you
need to feed power to the rails on both sides.
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