Preamer 3 Pcs Hex Shank HSS Titanium Coated Step Drill Bits Set for DIY Woodworking Tool,4-/12/20/32mm

well, what is there to say. these and I'm sure others like these made in you know where are very inaccurate and the quality is what it is maybe good for one job or two in aluminum or thin metal. so if you are after precision drilling that hole size, then don't bother. if you can live with being close then take the loss. I'm not returning mine because I doubt if you can find a set that is accurate and taking an hour out of day and a trip to ups is not worth it.

For a person like me that just needs bits like this once in a great while they work great. no issues with them they work as expected. Since I'm not a professional and do not use these everyday I can't say how long they will last but for me they might be the last set that I will ever need. Great produce at the right price.

Easily makes perfect holes to the exact diameter requested.

Good product

Exactly what I needed for my HID kit install on my car. Heavy duty and worked like a charm. Recommend

These bits ate through metal like butter. I live how you can easily enlarge the hole step by step without switching bits.

Bought these to drill parking sensors holes on a bumber.

Top notch quality product...worth their weight in gold...figuratively speaking...