If you’re buying a kit without a nail/banger included, always ensure that the nail/banger you plan on using with your unit is not one intended for torch use only. Torch bangers aren't made with precise measurements as they're usually rounded up or down in size which is an issue when trying to use them with an E-Nail coil as they have to be same exact size to fit and E-Nail bangers usually have a mechanism on the banger to hold the coil(a stem or hook). So in short, it's always safer to get a nail/banger from the same company you purchase the E-Nail from as it's guaranteed to fit.