The Yale Y227B Maximum Security Weatherproof Padlock has a solid steel lock body and boron shackle, with a protective cover on the lock body and key hole for additional weatherproof protection, and has been tested up to 120 hours for corrosion resistance. The lock has been tested to EN 12320:2012 for ensured resistance against attacks by cutting, twisting and pulling of the shackle. It is supplied with 3 keys with double ball locking for added security and has been tested to 10,000 cycles for the opening and closing of the shackle to ensure optimum performance.