Haven't tried it with metal but it's great with wood.
It was great! I make and assemble cabinets. I use them in the shop and in the field. I have tape on some for pre-drilling for a specific drilling depth. The length is great for pre-drilling pocket holes to avoid splitting and many other uses.
Pros
βοΈ SURFACE TREATMENT: Ember gold oxide surface treatment increases the hardness of the drill body for long life and better drilling performance.