At KnifeKits, we offer an extensive line of automatic knife tools and replacement switchblade parts for DIY automatic knife making and repair. From coil springs for switchblade replacement to knife spring pocket cutting tools for automatic knife conversions, we have the automatic knife making tools and parts that you need. We also offer leaf spring material for repair and improvement of leaf spring fired switchblade knives. We even offer a line of DIY convertible button release knives that can be made into coil fired automatic knives for first reponders, fire, rescue and other professions where one-handed automatic opening knives are needed and used daily.