Excellent item from Bolt Lock.

Made in the USA, BOLT cable locks feature a solid zinc core and an automotive-grade cylinder with a patented 6 plate-tumbler sidebar to deter theft. That means the only way to open BOLT cable locks is with your ignition key. Now, that's breakthrough one-key technology! These cable locks feature a stainless steel lock shutter design to keep out moisture and dirt, and a rugged Santoprene jacket, which helps to protect your gear. BOLT cables are 6 ft. long, GAC coated in black vinyl to 5/16 in. o.d., and coil-sprung for compact storage.

Easy to use! Just slide the key in that you want to use with the lock and turn it until it clicks and you've just keyed the lock. Instead of needing to carry around several keys with your truck, all you need now is your trucks ignition key.

Bolt also makes other lock items such as pad locks, tool box locks and hitch pins. So forget about having to look for and carry around all those keys, just grab your vehicle key and go.

Cable Lock, .312 x 6' cable, Uses Ford Ignition Key