ZELCAN Large HSS Spiral Groove Step Drill Bit, 12 Sizes Titanium High Speed Steel 14 to 2-38 Drill Bit for Sheet Aluminium Metal Wood Hole Drilling, Big Multiple Hole Stepped Up Bit for DIY Lovers

In a recent review, the CO-Z Cobalt Added M35 Step Drill Bit received mixed feedback. Some users found it to be effective and efficient, with one individual expressing satisfaction for its ability to cut through a steel jeep body without any issues. However, there were concerns raised about its effectiveness on materials such as 2" channel and thicker metal sheets. One user reported that the bit broke after drilling just four holes. The product received mixed feedback in various scenarios, with some expressing satisfaction for specific use cases and others finding it ineffective for thicker materials or experiencing breakage.