Pull Down/Twist 90°/Push In and Lift Up/Twist 90°/Push In—Pull down/twist 90°/push in and lift up/twist 90°/push in carabiners are more secure than twist 90°/push in because they require an extra step to open.

Anodized Steel—Anodized steel carabiners offer excellent corrosion resistance.

Zinc-Plated Steel—Zinc-plated steel carabiners are mildly corrosion resistant.

Anodized Aluminum—Anodized aluminum carabiners offer excellent corrosion resistance. They're also more lightweight than zinc-plated steel carabiners.

Aluminum—Aluminum carabiners are more lightweight and resist corrosion better than zinc-plated steel carabiners.

316 Stainless Steel, 17-4 PH Stainless Steel, and 420 Stainless Steel—Stainless steel carabiners have excellent resistance to salt water and chemicals.

Style 2—Style 2 carabiners have a spring-loaded wire to keep rope secured to one end, preventing it from sliding or moving. Lift the wire to release the rope. When you let go, the wire springs back into place.

Styles 3, 7, 8, 9, 10, 11, 12, and 13—Styles 3 and 7-13 have either a removable eye pin or eyelet that secures rope to one end of the carabiner to prevent it from sliding or moving.

Offset Open Latch Position—Carabiners with an offset latch position open to the side, giving you more space to attach large items.

With Locking Indicator—Carabiners with a locking indicator have a symbol that is shown when the carabiner is fully locked.

ANSI/ASSP Z359.12—Carabiners that meet ANSI/ASSP Z359.12 have been tested for use in fall protection systems.

Unlocked Setting—Some carabiners have an unlocked setting, making it easy to add your rope or strap. Lift up the latch then twist it. It will remain unlocked until you push in the latch. Once the latch is pushed in, it springs back and locks into place.