Universal Ladder Rack Bracket Lockable Secure Ladders Locking Brackets Neilsen

ManoMano

Neilsen Universal Ladder Lock Universal ladder lock giving a practical system for the safe, convenient and secure storage of most ladders Hooks come complete with a locking bar for additional security if a padlock is required Two brackets are approximately 225 x 170mm

Amazon

XTools Universal Ladder Clamp Roof Rack Secure Lockable Clamps