Amazon.com: urban UR140 Motorcycle Helmet Lock & Cable & T Bar Extension, Carabiner Lock for Helmet, Bike Bicycle Handlebar Combination Helmet Lock Code Anti-Theft Kit, Strap D-Ring, Steel Cable : Sports &
Oxford LidLock - Black : Oxford Products
Motoworld Singapore - Oxford Lidlock Helmet Lock A lightweight aluminium outward-opening carabiner mechanism carabiner to attach to the helmet's D-rings or to secure your helmet so that would-be thieves don't walk off