Abusive Lab Test: Brawny Bike Locks

Freeze and Hammer: After freezing the crossbar with aerosol propellant, we smacked it with a ball-peen hammer, hoping to crack the metal.

Bottle Jack: Pry and pry again: We wedged in a 4-ton bottle jack and pumped away.

Angle Grinder: Say hello to our little friend: a cordless angle grinder armed with a 1/8-inch cutoff wheel.

Source: http://www.popularmechanics.com/technology/gadgets/tests/abusive-lab-test-brawny-bike-locks?src=rss

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