When it comes to turning aluminum and brass on a lathe, the WNMG 432 Indexable Carbide Turning Inserts have proven to be a reliable companion. These little guys may be small, but they pack a big punch. The sharpness lasts longer than your typical turning insert and the high-quality finish left on the material is second to none. Not to mention, they're durable enough to withstand the toughest of jobs. The only downside is that they can be a bit pricey compared to other inserts on the market. Overall, if you're serious about machining aluminum and brass, these inserts are worth the investment.