Xtreme Bright Illumilock Super U-Lock Bike Lock and Taillight Included - Heavy Duty - Comes with 2 Keys (1 Lighted) The most secure & easy to use bicycle security device available(16cm x 7cm) - Made from military-grade woven steel, this drill resistant, shock resistant & water resistant design is the most secure & easy-to-use. Great for securing more than just bicycles. Keep your storage units secure as well as gates, sheds, moving trucks, campers, trailers & much more! Easily unlock your device even in the dark! 2 keys are included & one has an LED for easy nighttime unlocking. Included rear bicycle light keeps you safe from speeding drivers. Modes include: Solid, Flash & Strobe. This light conveniently mounts inside your padlock when not in use. Set offered with a 100% Lifetime Guarantee. Your order is risk-free so buy yours today!