by Robotnik » 5 Jan 2015 2:17
From the product description:
"It features a patent-pending Z-cylinder, which is a unique mechanism that provides more security than traditional locks. When combined with the pick, pull and drill-resistant cylinder, it provides virtually unbreakable protection for your bike."
Not to be contrarian here, but digging up something to tension the odd keyway is far and away the hardest part of picking these. Not a freaky difficult pick, to say the least.