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Petzl Sm'D Twist-Lock Carabiner vs Unknown Phantom Carabiner

Weight and specs compared for 2026 — and which one to choose.

Unknown Phantom Carabiner is the lighter option — 23 g lighter than the Petzl Sm'D Twist-Lock Carabiner (45% less weight). If grams matter to you, that is the one to beat.
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Spec Petzl Sm'D Twist-Lock Carabiner Unknown Phantom Carabiner
Weight 51 g · 0.051 kg · 0.11 lb 28 g · 0.028 kg · 0.06 lb
Brand Petzl Unknown
Category Safety Safety
Petzl Sm'D Twist-Lock Carabiner
51 g

Lightweight aluminum D-shaped locking carabiner with twist-lock gate, 23 kN major axis, certified CE EN 12275 and UIAA.

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Unknown Phantom Carabiner
28 g

Lightweight climbing carabiner at 1oz. Full UIAA certified.

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Petzl Sm'D Twist-Lock Carabiner vs Unknown Phantom Carabiner: which should you buy?

If saving weight is your priority, the Unknown Phantom Carabiner wins — at 28 g it is 23 g (45%) lighter than the Petzl Sm'D Twist-Lock Carabiner (51 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest safety page, or browse the full gear weight database.

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