The General Motors lock-pick set consists of 12 double-ended rocker picks, providing 24 combinations that cover the 1000 plus possible key cut configurations for General Motors side bar locks. This set works on most G.M. (Buick, Cadillac, Chevrolet, Oldsmobile, Pontiac, and GMC trucks and vans) steering column, door, and trunk locks. G.M. side bar locks are the most difficult U.S. automotive locks to pick, but with this set and practice, patience, and more practice, you can learn to master these locks. Not for use on VAT (PASS) system ignition locks (the G.M. keys with the built-in microchip).