Master Lock 13mm U-Lock Heavy Duty Security Lock With 4 Keys Bicycle 210mmx110mm. This lock features a 13mm hardened steel shackle for enhanced cutting protection and a double locking cylinder for superior pry resistance. It also includes a carrier bracket for convenient storage and a thermoplastic cover to prevent scratching. The shackle clearance is 210mmx110mm. It is silver/black in color. This D-lock is universally applicable to all bikes including road, mountain, folding, and electric bikes. It is weatherproof with a soft grip and has achieved high security ratings such as Sold Secure Gold (UK), Police Approved - Secure by Design (UK), VDS Klasse A+ (Germany), and SBSC (Sweden). The hardened steel body is resistant to cutting, sawing, and prying, while the double locking shackle can withstand 2 tons of pull force. The lock comes with a mounting bracket that has an adjustable diameter to fit all bikes and is lightweight at 1.26 kg. The U-lock dimensions are 1.3 x 21 x 11 cm. It includes 4 keys and a sliding dust cover to protect the keyway from dirt and moisture. The color is silver. It comes with a Limited Lifetime Guarantee.