This is a USB AVR programmer supported by offical Arduino IDE. Once the Arduino has lost its bootloader for some reasons, use this programmer to reburn the bootloader and save the dead Arduino.
This programmer works really well for ATmega168 and ATmega328 and should work with all the AVR micros supported by AVRDUDE. Both 10-pin and 6-pin targets supported (cable included) which makes the progrmmer suitable for most AVR boards. The Kit comes with both 6-pin and 10-pin AVR-standard connectors and cables.