Locking Cable Key Ring w/ Bare End | Lucky Line Products
Amazon.com: Lucky Line 4-1/2" Locking Cable Key Ring, Crimp to Permanently Close, Nylon Coated Steel Wire, Corrosion-Resistant, 25 Pack, Black (80820) : Clothing, Shoes & Jewelry
Cable key ring. Stainless steel cable with screw-in lock. Been using it for almost 10 years, with zero signs of wear. Link to buy in comments : r/BuyItForLife
How to Crimp Locking Cable Key Rings - YouTube
Shop for and Buy Twisty - Twist Lock Flexible Coated Cable Key Ring 24 Pack Assorted at Keyring.com. Large selection and bulk discounts available.