We subjected eight locks to our toughest test ever. How tough? We headed to German labs and subjected them to steel and tungsten saws, bolt croppers, the freeze-andhammer technique, grinding and even a corrosion test. That tough enough, ladies and gents…?
MASTERLOCK 8239 EURDPRO CRITERION GOLD £99.99 www.masterlock.com
The Criterion combines a 110cm chain with a mini U-lock shackle to form a long, heavyweight-rated chain lock. Under chilling and hammering – which comprised freezing the locks in a cabinet set at -40°C to, theoretically, make it more brittle before hitting with a sledgehammer – it was broken with three strikes from the 1m-drop sledge. Under sawing, the standard blade had little effect, though the tungsten took just over a minute per side. Bolt cropping on the links was in line with the competition, but the shackle bar proved as tough as the more expensive Homie. Under attack from the grinder, the links proved the most resilient on test. While the Criterion is a much simpler design than its rivals, it’s made out of strong stuff and does the job well.
7 Stood up well to the battery of debilitating tests