Miter gears are a single kind of bevel gears where in fact the two rotational axes intersect. When talking about narrow definition of bevel gears with ability to increase or lower speed, miter gears don’t have that ability due to the pair’s same amount of teeth. Their purpose is limited to the modification in miter gear china transmission direction. Because they are a kind of bevel gears, the basic characteristic of bevel gears can be found such as presence of gear types of straight cut, spiral lower and types.
Also, because the shafts can be set to any angle, there are miter gears with non-90 degree (non-perpendicular) angle called 
angular miter gears. Ever-power is certainly capable of generating angular miter gears with shaft angles in the range of 45 to 120 degrees.
Because a couple of straight tooth miter gears gets the same number of teeth, with the exception of minor differences such as set screw holes and key methods, the same two gears can mate with each other. However, regarding spiral miter gears, even when the amount of teeth will be the same, the twisting directions will vary. Therefore, the same equipment cannot be meshed together, and it is required to pair the proper and still left handed pairs.
Bevel gears are classified in different types according to geometry:
Direct bevel gears have conical pitch surface area and teeth are right and tapering towards apex.