The Kryptonite Evolution Series 4 U-Lock 4x11.5 In W/Bkt (1T) is a top-notch bike lock. It features a 14mm hardened MAX-PERFORMANCE STEEL SHACKLE that can resist bolt cutters and leverage attacks. The hardened DOUBLE DEADBOLT DESIGN offers extra protection against twist attacks. The HIGH SECURITY DISC-STYLE CYLINDER ensures high security. It comes with a NEW TRANSIT FLEXFRAME-U transportation system for versatile carrying. There's a protective vinyl coating and a SLIDING DUSTCOVER to protect and extend the cylinder life. You'll also get 3 STAINLESS STEEL KEYS, one with a high-intensity LED BULB and a REPLACEABLE BATTERY, and a Key Safe Program. The product dimensions are 4” x 11.5” (10.2cm x 29.2cm) and it weighs 4.10 lbs (1.86 kgs).

Using the Kryptonite Evolution Series 4 U-Lock is easy. First, unlock it with one of the provided stainless - steel keys. You can use the lighted key in the dark for convenience. Wrap the U - lock around a sturdy object and your bike frame, then lock it by inserting the shackle into the lock body until you hear a click. When carrying it, use the NEW TRANSIT FLEXFRAME - U transportation system to attach it to your bike in different ways. For maintenance, keep the lock clean. Wipe it down regularly to remove dirt and debris. Make sure the sliding dustcover is in place to protect the cylinder. If the LED bulb on the key stops working, replace the battery. Avoid exposing the lock to extreme temperatures or harsh chemicals. Also, if you lose your keys, use the Key Safe Program to get replacements.