The snaffle is the simplest form and largest group of bits. Typically this is the first type of bit an equine is introduced to wearing, and will often continue to be ridden in it throughout their entire life.

This bit works directly on the tongue, corners of the mouth, bars and sometimes the poll or cheeks. It acts to draw the horse's head inwards and upwards and provides signals to help control pace, speed, or direction whilst being ridden or handled. As the reins are attached directly to the cheek-rings, the horse will feel immediate pressure in their mouth when the rider takes a contact. This allows for simple and quick communication between horse and rider.

Overall the basic structure of a snaffle bit remains the same, consisting of either a straight or jointed mouthpiece with cheek-rings on each end. However today there are multiple formats in which this bit can appear. This variety allows the rider to find the correct bit which offers the most appropriate control and comfort for each equine. Style of mouthpiece, type of material used, cheek-rings, and how and where it acts on the horse will ultimately determine its mildness or strength.

When fitting any snaffle bit it should sit in the corners of the horse's mouth giving the appearance of 1-2 wrinkles on the lips; when pulled out to one side there should be ¼ inch of excess length. It must never interfere or be in contact with the teeth.