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Black Diamond Oz Screwgate Carabiner vs Cypher Climbing Mydas Ultra II

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

Cypher Climbing Mydas Ultra II is the lighter option — 8 g lighter than the Black Diamond Oz Screwgate Carabiner (25% less weight). If grams matter to you, that is the one to beat.
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Spec Black Diamond Oz Screwgate Carabiner Cypher Climbing Mydas Ultra II
Weight 32 g · 0.032 kg · 0.07 lb 24 g · 0.024 kg · 0.05 lb
Brand Black Diamond Cypher Climbing
Category Safety Safety
Black Diamond Oz Screwgate Carabiner
32 g

Ultralight screwgate carabiner for via ferrata.

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Cypher Climbing Mydas Ultra II
24 g

Ultralight carabiner at 0.85oz with 22kN rating. Wire gate design.

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Black Diamond Oz Screwgate Carabiner vs Cypher Climbing Mydas Ultra II: which should you buy?

If saving weight is your priority, the Cypher Climbing Mydas Ultra II wins — at 24 g it is 8 g (25%) lighter than the Black Diamond Oz Screwgate Carabiner (32 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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