PRIMA - Auto Lock - Gold Outer Dimensions: 8.75" x 5.25" This ladder-hook carabiner has a 2 1/4" gate opening, making it ideal for firefighters and rescue work. It has an auto-locking gate with an extra generous gate opening so it easily fits over ladder rungs. It is made of high density alloy steel for extra strength. Captive eye pin included. Meets ANSI Z 359.1 2007standards. MBS:45kN