Review on 🔧 SainSmart Genmitsu 10Pcs Router Bits 0.8-3mm by Auden Paz

So far they have performed great when cutting wood. Just make sure your channels and speeds are correct. If you run them too fast they break, if you run them too slow you create friction that heats them up until they wear out very quickly. Even the world's most expensive end mills can fail due to operator error. I've had good results cutting hardwood with a 1.4mm bit with SFM: 141, chip load 0.005 and depth of cut 0.0157 (4mm). I probably wouldn't recommend cutting metal with it, but haven't tried it yet.