Nite Ize SlideLock Carabiner #6 - Black | D-shaped Steel Carabiner with Lockable Wire Gate | 100 lbs Weight Rating in the Carabiners department at Lowes.com
NFPA Large D Carabiner - Twist Lock (Black) - Climbing Carabiners | U.S. Rigging Supply
SMC/SKEDCO Kinetic Screw Gate Carabiner, Black - Skedco
Omega Pacific 7/16 Steel Mod D Screw Gate Black Carabiner 53KN OP76S3 | eBay