Opens With Your Vehicle Ignition Key -- Fits couplers from 1/2" to 3 3/8" and any size in between -- Stainless Steel Pin -- Lock slides Back and forth along pin for ease of use -- 1/8" incremental adjustment allows for a snug fit -- Weather Proof -- Plate Tumbler Sidebar to Prevent Picking and Bumping -- For best performance of your BOLT Locks please try your Nissan key in the glove box lock before coding your BOLT Lock. If the key does not easily fit please locate a key that does work in your glove box before proceeding. A key that works in your glove box should be the only key used to code your BOLT Locks.