The Atoplee Nitriding Black Spiral Fluted Industrial Drill Bit is a must-have in my toolkit .According to my experience, it smoothly and efficiently drills into a variety of surfaces including metal and wood. The fluted design works wonders in removing debris and it is durable enough to withstand heavy use. The only downside I`ve encountered is that it is a bit pricier than other drill bits but its quality more than makes up for the cost. I highly recommend it for any DIY or professional project!