Installing tool, door and trunk handle ferrule. For GM cars and trucks using door and trunk handle ferrules such as our 70-0111-69. Without it ferrules are very difficult to install and impossible to reinstall after painting. This tool, copied precisely from a Fisher Body original, does a quick, neat & efficient job of installing ferrules staking them internally to keep them in place. It is precision-machined with hardened blade, adjusts for depth of reach, knurled for firm grip, plated for durability. Well worth it for even one car.