Lightest

The lightest biner reviewed, the slim, airy Cypher Mydas nonetheless had a capable feel and middling size that testers appreciated—the biner is just (just) large enough not to weasel from your grip in clutch situations, and the gate opening was ample and avoided snaggage. The Mydas’ I-beam construction is quite aggressive but still reliable in the hand: The three super-recessed I-beam pockets made for good grabability along the ridges and declivities, without compromising strength. As with all ultralights (and especially at this super-slim level), the key consideration is intended usage: Are you slapping these on fixer draws for a roadside, biner-abusing siege-fest, or are they incorporated into your alpine trad rack? For the latter usage, the Mydas, with its functional trapezoid shape, is a great choice, and the stiff gate action was a notable plus as well.