OnGuard Brute STD

OnGuard offers one brute of a U-lock with their highest security Brute STD, which is ideal for serious protection in high-risk areas. Its massive 16.8mm-diameter ultra-hardened-steel shackle laughs at bolt cutters and pry bars. OnGuard's solid X4 bolt lock boasts four steel pins that engage at both ends and a triple-reinforced steel crossbar to create a redundant, secure system for top-notch protection. This lock comes with five keys, including one with a built-in light.