Extra Large Steel 3 Stage Locking Carabiner.

The Extra Large Steel 3 Stage Locking Carabiner has the key gate for easy clipping and unclipping into cables, harnesses, gear and bolts. The super big 1" gate opening allows lots of gear, runners, ropes to be clipped into the carabiner basket. This is a great carabiner for zip lines, rescue applications, industrial use, ropes courses and more. 3 stage locking give you the security of knowing your carabiner will not come open by contacting other course components or gear.  Long axis is 4-3/4",  Weighs 8.9 oz.