Simply put, if you need to drill holes in plastic and soft metal, you cannot beat this bit for this price. I use it to drill 7/8" to 1-1/4" holes in plastic buckets to install various bulkhead valves for home brewing, and I could not be happier with this bit. If you need to put large holes in stainless steel, however, you're better off with a knockout punchor, taking the work product to a machinist.