PETZL Sm'D Screw-Lock Carabiner — D-shaped Screwgate, Keylock Nose, Lightweight

The Petzl Sm'D Screw-Lock is a lightweight, D-shaped screwgate carabiner designed for secure belays, anchors, and attachment of small pulleys while remaining easy to operate in dirty or cold conditions.

Engineered for climbers who need a reliable, no-nonsense connector, the Sm'D combines a narrow, strength-optimized D profile with an ergonomic H-section for better grip, a keylock nose to prevent snagging, and a simple screw-lock sleeve that gives a clear visual cue when unlocked. Built to pair with belay devices, small pulleys like the TIBLOC or MICRO TRAXION, or as an attachment point on lanyards, this carabiner balances lightness and durability for alpine routes, cragging, and technical work at height.

How does the Sm'D perform on belays and anchors?

The D-shaped frame directs load toward the spine for efficient strength, and the screw-lock gate provides a secure manual locking option preferred in abrasive or freezing environments. Its compact profile keeps the belay station tidy while allowing easy rotation of devices and ropes.

• Strong spine alignment reduces cross-loading risk
• Screw-lock sleeve resists jamming from dirt, mud, or ice
• Compact shape fits common belay devices and anchor setups

Why is the Sm'D comfortable to handle with gloves?

The H-shaped cross-section of the Sm'D improves grip area and finger purchase, making it easier to manipulate in cold weather or with thick gloves. The keylock nose prevents catches on webbing or hardware, so clipping and unclipping is smoother during fast transitions.

• H-section increases ergonomic contact for gloved hands
• Keylock system eliminates involuntary snagging
• Simple screw mechanism can be operated with minimal dexterity

Can I attach small pulleys or fall-prevention accessories?

Yes — the Sm'D includes a keeper hole sized to accept a cord-mounted TIBLOC or MICRO TRAXION, which helps secure those devices and reduces the chance of dropping gear. The carabiner’s geometry supports both inline pulley use and connection at the end of a lanyard.

• Keeper hole allows tethering of small pulleys with cord
• Narrow gate opening accommodates many personal anchors and lanyards
• Durable construction suitable for frequent attachments and removals

How does the screw-lock compare to automatic locking gates?

The manual screw-lock offers straightforward reliability in harsh field conditions where auto-lock gates can seize from grit or ice. The visible red band indicates when the gate is not fully secured, providing an immediate visual safety cue before loading.

• Manual screw system less prone to performance loss in dirty settings
• Red unlocked band gives quick visual confirmation of gate status
• Easy to open when deliberate action is needed, yet secure when screwed

Who is this for? Climbers, guide professionals, and rescue technicians who want a small, strong, and dependable screwgate carabiner that performs reliably in alpine, mixed, or muddy conditions will value the Petzl Sm'D. It’s ideal for anyone who needs an ergonomic connector that pairs cleanly with belay devices and small pulleys, or for those who prefer a manual locking gate that won’t seize in the elements.