The tumblers on Bolt Lock’s One-Key Lock Technology Cable Locks are crafted to memorize a vehicle’s ignition key with one complete turn of the key, allowing contractors to safely secure ladders on rooftop racks, without adding another key to the ring. Weatherproof and designed to repel dirt and moisture, according to the manufacturer, the cable lock has a 6-foot-long coil wire coated with 1/4-inch-thick black vinyl and a double ball-bearing lock mechanism. Locks are year/make/model specific and are available for most General Motors, Ford, Ram/Jeep, and Toyota vehicles. Contact a local retailer for pricing information.