Kryptonite 'Evolution Mini 5' U-Lock

You want a strong Ulock that fits in your back pocket!?This is your jam then!
3.25" x 5.5" (8.3cm x 14cm)
13mm MAX-Performance steel shackle resists bolt cutters and leverage attacks
Reinforced cuff over crossbar and cylinder for added security
Improved high security, disc-style cyclinder
High security Bent Foot(TM) design
Center keyway defends against leverage attacks
Anti-rattle bumpers reduce noise during transport
Rotating dustcover protects cylinder
Includes versatile EZ Mount transportation bracket
3 keys - one lighted with high intensity bulb & replaceable battery