Kryptonite Kryptolok 912 Bike Chain Lock, 4 Feet Long 9mm Steel Chain Heavy Duty Anti-Theft Sold Secure Gold Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence

9mm four-sided chain links made from 3T MANGANESE STEEL, Patent-pending END LINK DESIGN secures chain to hardened deadbolt eliminating critical vulnerability, Hardened DEADBOLT DESIGN provides additional protection

• 9.5mm FOUR-SIDED CHAIN LINKS made from Kryptonite’s high performing MANGANESE STEEL.
• Patent-pending END LINK DESIGN secures chain to hardened deadbolt eliminating critical vulnerability
• Hardened DEADBOTL DESIGN provides additional protection. Patent pending integrated lock head with "TALON" DEADBOLT
• HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant
• Weather-resistant nylon sleeve PREVENTS SCRATCHES to painted finishes; compact coiling for easy carrying.
• Includes 2 STAINLESS STEEL KEYS, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking.