Lumintrail Mounting Bracket for LK-21051 Bicycle Cable Lock; Fits 12mm Cables Easy to install, fits bicycle frame tubing from 19mm to 32mm Removable inserts ensure snug fit, protect bike finish Keeps lock secure when riding, fits 12mm diameter locks Low profile mount attaches almost anywhere on bike frame Compatible with Lumintrail LK-21051 Cable Lock and all 12mm cable locks