Hakko FR-300 Desoldering Tool with N50-01 & N50-06 Nozzles Contains the 2 most popular nozzles, the N50-01 (0.8mm) and N50-06 (1.6mm). Easy-to-clean solder recovery chamber minimizes maintenance and reduces waste. Fast release tool for the quick-change nozzle system. Closed-loop sensor integrated heating system for improved thermal performance. New pump design that lowers vibration and noise, but improves vacuum pressure and flow.