U-Lock Wrench

Simple and effective. This is what good design is all about. “This astoundingly innovative #15 wrench fits perfectly on end of any Kryptonite Evolution (orange) or Series 2 (gray) U-Lock. With the leverage of the “U” removing a wheel has just become impossibly easy.  No extra tools needed to change a flat on the fly.” $29.99 from missionbicycle.com

U-Lock Wrench

U-Lock Wrench

Image from missionbicycle.com