The Nite Ize SlideLock Carabiner has a slide-to-lock feature that securely locks the gate with a simple push and slide movement, and unlocks when you want it to just as easily. The rectangular stainless steel body is low profile, and slim; it feeds more easily through smaller openings and rests flat in pockets.__Size 4 would be perfect for attaching to a belt loop or backpack to carry slightly larger items like bottles.Size 4Durable Stainless Steel Locking Utility CarabinerSecure stainless steel wire gate with a slide-to-lock featureAlso available in Stainless SteelDimensions: 2.0" x 3.1" x 0.1" | 52.0mm x 78.5mm x 3.0mmWeight: 1.1oz | 31.00gWeight Rating: 75lb | 34kgWARNING: Not for use where disengagement could result in bodily injury or property damage. Not for climbing.