Review on 🔧 Bonsicoky Carbide Stainless Plastic 16-53mm by Robert Hole

I bought these two holes for drilling in plastic and aluminum T6061. They work great for this purpose. I haven't tried them in steel so can't comment on how durable they are but in softer materials they are very durable and amazing quality considering the very low price. Like all large hole drill bits, they are best used on a drill press.