Necklace with lock: engravable, silver – THOMAS SABO
WANLIAN Safety Chain Lock-Chain Length 50 cm, with 8 mm Thick Hardened Special Steel Round Chain Lock-Cycling Chain Locks-Motorcycle Lock-Suitable for Electric Bicycles, Bicycles and Motorcycles : Amazon.co.uk: Sports & Outdoors
Large Padlock Pendant with Chain - The Great Frog London - USA
6mm Leather and Stainless Steel Chain and Master Padlock - Etsy UK