Product Description Quick stops in the city shouldn't mean leaving your bike or e-scooter unattended and unprotected. This handcuff-style chain lock from ROCKBROS is designed for urban commuters who need fast, reliable security without the bulk. The double-ring mechanism attaches quickly to rails, poles or fixed objects, while the chrome-plated steel chain and zinc-alloy lock cylinder provide a solid, dependable barrier against opportunistic theft. Lightweight enough to slip into a bag and compact enough to carry every day, it's the kind of lock you'll actually remember to bring. Key Features Handcuff-Style Fast Attachment The double-ring handcuff design allows quick and secure attachment of e-scooters, bikes or accessories to rails, poles or fixed objects up to 54 mm in diameter — practical for everyday urban use and short stops. Solid and Reliable Build Chrome-plated steel connectors and stainless steel rivets deliver stable, dependable locking. The zinc-alloy lock cylinder sits inside an impact-resistant ABS housing built to handle daily wear. Scratch-Free Steel Chain The 59.5 cm chrome-plated A3 steel chain measures 3.5 mm in thickness and features a polypropylene textile sleeve that protects your frame from scratches and makes the chain comfortable to handle. Two Keys Included Comes with two keys as standard — useful for commuters, households or shared use, so a misplaced key never leaves you stranded. Compact and Lightweight Weighing approximately 502 g, the lock is easy to carry in a bag or backpack. Compact enough for daily transport without adding unnecessary weight to your commute.