This book is for both curious beginner equestrians and their experienced mentors. In particular, we will talk about the “gearbox” that is located in one horse vulture in such a sensitive place as its mouth. As close as possible to the original source the translation, if it doesn’t reveal anything new to you, will at least introduce you to the range of iron for riding horses from the German company Hermer Sprenger. Or maybe you will simply be respected by the serious scientific and analytical approach with which the creators of the iron (bit) for horses relate to their work. From myself: the horse’s mouth is the very gearbox that determines whether you are driving a Mercedes or a Zaporozhets. Or in another way: people are not born tight, they are made tight. In addition to introducing horse hardware, the book briefly introduces other products of the Sprenger company - stirrups and spurs. Sincerely yours, Horse World.