The Hakko T33-BC6 Ultra Heavy Duty Bevel Soldering Tip measures 6mm / 45° x 13mm. Use with the Ultra Heavy Duty Soldering Iron. The iron is used with the Ultra Heavy Duty UHD Soldering Station which is the ideal soldering station for extremely large mass components, such as high current inductor coils, heat sinks, large transformers, shields, and other difficult solder applications where there is a significant amount of thermal inertia that must be overcome, enabling you to solder some of the most challenging solder joints.