The Metcal SMC-9HK0005S Hook Soldering Cartridge, 900°F, 0.5mm, uses patented chip-in-cartridge technology and has a hook tip and temperature rating of 900°. The chip-in-cartridge technology has closed looped bi-directional communication that stores and records cartridge attributes. The SMC-9HK0005S also provides traceability information and protects the power supply from non-conforming cartridges. This cartridge is backwards compatible with MX series power supplies.