What size carabiner should be used for a munter hitch?

• A. S carabiner
• B. M carabiner
• C. XL carabiner
• D. L carabiner

Answer: (C)

The test is about selecting a carabiner size that lets a munter hitch operate smoothly. In a munter hitch, the rope threads around the carabiner’s inside surfaces, so you need enough internal clearance for the rope to move without snagging on the edges or the gate. A carabiner that’s too small can cause the rope to bind, jam, or wear more quickly, making the belay harder to control.

An extra‑large carabiner provides ample space for typical rescue rope diameters and the two-rope geometry of the munter hitch, allowing the rope to pass through cleanly and the hitch to function predictably under load. That’s why the XL size is the best choice. Smaller sizes would tend to bind or snag, while the XL offers the most reliable clearance for smooth operation.