• 12.7mm hardened high grade performance alloy steel shackle resists hand tools
• New hardened double deadbolt engages both shackle ends increasing holding power
• Patented new "pass-thru" crossbar design includes anti-rotation features providing advanced protection against twist and single cut attacks
• Includes FlexFrame-U bracket providing convenient multi-location u-lock transport
• Includes 2 stainless steel keys with ergonomic design to reduce torque and keep theem from bending or breaking
• New sliding dustcover
• Reinforced hardened crossbar design provides more protection for the lock internals
• Key Safe Program

Patents 6397648B1, 9079626B2, 9670698