To accomplish this, various refinements have been made to produce the type of drilling attachments and precision drill bits which are a part of this kit. In a world where the size of things from cars to computers is getting smaller everyday, there is an increasing need for tools which function comfortably in tight spots. Our knuckles and frustration levels are beginning to demand them! The drill bits supplied with this kit are identical with those supplied to industry and meet or exceed the National Aerospace Standards. These tools, if used correctly, should give the user years of dependable service.