, I love all Hakko tips, I only use Hakko tips and have never had a problem with any of these. Other cheap ones literally have holes or big dimples. I've never had a Hakko tip fail like this. The 4mm 45° tip is ideal for large solder joints that require high heat transfer. I usually get by with a t18 c3 with say 12 gauge wire with a large ground pad at 400-425c. When using this tip at 400°C, the soldering time is halved simply because of the larger surface. I like this tip, it has its place…