Large Steel Screwgate carabiner - steel carabiners are referred in ropes course, zip line, and cable applications.

This Large D Screwgate is great for all ropes course and adventure course applications. Superior performance using a key gate to eliminate hang ups and harness snags,  Measures 4-5/16 on the long axis and has a huge 1" gate opening to accomodate tons of gear, bulky harnesses, thick cables and big zip line trolleys. Weighs 7.3 oz.