The Mason is the world's lightest Sold Secure Gold standard rated bike lock. While the protection it offers is heavyweight this lock only weighs as much as two regular 330ml beverage cans. The compact 'mini-D' configuration is ideal for securing a single bike in more risky built up areas.
The high level of security is achieved by use of a unique triangulated 17mm shackle for the best strength to weight ratio. The crossbar features a double deadbolt locking mechanism for protection against twist attacks and an anti-drilling key cylinder. Seatylock have ensured lasting durability by using rust free hardened steel and a rattle free dampened design.