Screw locking carabiner from ISC. Use this screw lock carabiner to attach swing side snatch blocks, slings or rope end accessories. Zinc plated with anodized aluminum screw gate lock. Swivel gate opening: 2.5 cm (1"). Not for personal support. Sold in a 2 pack.
I found this on the Baileys Online website, http://www.baileysonline.com. I thought you might be interested in seeing it for yourself. Please click on the following link to view the page: