So I am thinking about combining different diameters within one drill bit. We named it Four-stage Drill Bits. Made of cobalt HSS, this drill bit requires less thrust force to operate, delivers faster drilling performance, ensures durability and offers size versatility at the same time.
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Suitable for cutting through Hard Metal such as Stainless Steel≤3/8”, Steel, Carbon Steel and Cast Iron as well as Plastic, Aluminum Alloy, Wood and Other Softer Metals.
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Compatible with the majority of brands of drills, drill presses, and impact drivers.
INSTRUCTION
Pay attention to speed, pressure, and heat control during drilling.