The Parrying Dagger: The Rapier's Left-Hand Partner
For about a hundred years, from the middle of the 16th century to the middle of the 17th, a gentleman who carried a rapier usually carried a second blade with it: a dagger, worn at the right hip, drawn with the left hand, and used not to stab but to catch. That is the parrying dagger. It is the most specialised dagger Europe produced, and the one most people have seen without knowing its name, because it appears in every duel in every film set in the age of the musketeers.
What a parrying dagger is
A parrying dagger is a dagger built to be used with the off hand while the main hand holds a sword. The blade is stiff, usually 10 to 14 inches, and often thickened toward the point. The hilt is the giveaway: a long straight or curved cross guard, frequently with a side ring on the outer face to protect the knuckles, because in a rapier fight the left hand is closer to the opponent's point than the right. Its job was to deflect the incoming blade, bind it for a moment, and open the line for the rapier to thrust. The Italian and Spanish fencing masters wrote whole chapters on it, and their diagrams show the dagger doing at least half the work.
The term is a modern collector's word. In period the French called it the main gauche, the left hand, and that name has stuck to the most common form.
The main types
Main gauche
The standard form: straight cross guard, side ring, a blade that is often ricasso-heavy near the hilt so it can take a hard bind. Spanish examples from the 17th century add a large triangular shell guard that wraps the whole hand, which is the version most reproductions follow because it looks the part.
Sword breaker
A dagger with deep teeth cut into one side of the blade, so an opponent's rapier could be caught in a notch and held, or twisted. The name overpromises. A sword breaker rarely broke anything; it trapped the blade for the half second a thrust needed. They are uncommon in surviving collections and were always a specialist's choice.
Trident dagger
A blade that splits into three on the press of a catch, the two side blades springing out to form a wide trap. Spectacular, mechanically fragile, and probably more common on the modern market than it ever was in a 17th century hand. Treat it as a curiosity rather than a fighting tool.
Quillon dagger
Not strictly a parrying dagger, but the family it grew from. The medieval quillon dagger is a plain cross-hilted dagger shaped like a small arming sword, and the main gauche is what happened to it once fencing schools needed something more protective for the off hand.
How it was actually used
The dagger led. In the Italian system the left hand and dagger were held forward, closer to the opponent than the sword, and the rapier waited behind it. Parries were made with the dagger's forte, the strong section near the hilt, and the rapier answered through the opening. In the Spanish destreza tradition the dagger sat lower and the geometry was subtler, but the principle held: the dagger controls, the sword decides. A parrying dagger was almost never the killing weapon. It was the reason the killing weapon got through.
What to look for in a modern one
Stiffness. A parrying blade that flexes is a decorative blade. Look for a thick spine and a diamond or hexagonal cross-section.
Guard reach. The quillons should extend well past the hand, and a side ring or shell is what separates a parrying dagger from an ordinary cross-hilt dagger. On a display piece this is also what gives the silhouette its character.
A matching rapier. Historically the pair were made together, with the same hilt style and the same decoration. If the dagger is going on a wall beside a rapier, matching the guard style makes the pair read as a set rather than two purchases.
Steel. Ours are hand forged in 1095 high carbon or pattern-welded Damascus, the same steels as the swords they partner. Both want to be kept clean, dry and lightly oiled. Every current piece is in the daggers collection, and the vocabulary, quillon, ricasso, forte, pommel, is labeled on our parts of a sword diagram.
Frequently asked questions
What is a parrying dagger used for?
Deflecting and briefly trapping an opponent's sword with the left hand, so the rapier in the right hand can thrust. It is a defensive companion weapon, not a primary one.
What is the difference between a parrying dagger and a main gauche?
None in practice. Main gauche is the French period name; parrying dagger is the modern collector's category that includes it, along with sword breakers and trident daggers.
Did sword breakers really break swords?
Almost never. The teeth caught and held a blade for a moment. Breaking a hardened rapier blade with a hand tool is not realistic.
Which hand holds the parrying dagger?
The left, for a right-handed fencer. It was worn on the right hip so the left hand could draw it across the body while the right drew the sword.
How long is a parrying dagger blade?
Usually 10 to 14 inches. Longer than a general-purpose dagger, shorter than a short sword, and stiffer than either.
About the author
Owen Juarbal is Director of Marketing and head writer at Battling Blades. He has been with the company since 2021 and writes or reviews every guide the team publishes. Read more about Battling Blades.
