I, personally, find it very hard to learn all those numerous names of even the smallest harness parts. (Not to mention that English is not my native language... :)))))
But to be able to talk Whip, you should try to get more familiar with all these names and expressions.
And after all, it will impress not only your friends, you might also get a better deal when buying horse driving tack...
This is a standard driving bridle without a bit. You could use a broad variation of bits and would have to find out which suits your horse best.
Parts of a Straight Collar
Shape of a Piped Collar
See the difference between a straight collar and a piped collar. You may have noticed that there are no hames illustrated on these collars. Hames are that part of the harness to which the traces are buckled on and the horse is enabled to pull a vehicle or object.
This is the illustration of a Single pad with Back strap, Crupper and Breeching. The Shafts are not outlined in this drawing.
Breast Collar Harness for a Single Horse
See, how it looks like on the horse:
Single Breast Collar Harness
Breech Assembly
A Pair pad is slightly different compared to a Single pad. There are no tugs for fixating the shafts, because both horses are tugged to the pole with a pole chain through the pole chain ring of the collar or breastcollar.