Can't go wrong with the lightest.
The Nitron Screwgate Carabiner is Black Diamond's lightest biner for building anchors on any climbing route whether it's sport, trad, or alpine. Black Diamond designed it with a keylock nose for snag-free convenience when you're cleaning.
Screwgate locking carabiner
Snag-free keylock nose
Item #BLD00HK
Material: hot-forged
Gate Type: screwgate
Features: keylock nose
Major Axis Strength: 24 kN
Minor Axis Strength: 7 kN
Open Gate Strength: 8 kN
Gate Opening: 22 mm
Claimed Weight: 1.8 oz
Recommended Use: climbing
Manufacturer Warranty: 1 year