3Pcs High Speed Steel HSS Titanium Coated Spiral Step Drill Bit Set, 4-12/4-20/4-32mm 29Sizes, 1/4" Hex Shaft Drive Quick Change Multiple Industrial DIY Woodworking Punching Tools by Jelbo …
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<b>[Product Information]</b><br>
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<li>✅ 1/4" Hex shaft drives are suitable for all kinds of power drills.</li>
<li>✅ Double cutting blade design makes for cutting faster,automatic deburring from hole when drilling.</li>
<li>✅ 3Pcs spiral step drill bits, 4-12/4-20/4-32mm 29Sizes,main material high speed steel, titanium coated high quality step drill bits.</li>
<li>✅ Step drill, also known as stepped drill or pagoda drill, mainly for wood and steel drilling processing.More steps and dense make the hole smoother.</li>
<li>✅ According to the need to process different diameter holes, you can achieve one-time processing of large holes, no need to replace the drill bit and positioning hole.</li>
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