<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><h1>Product Description</h1>
Size: 3-12mm/4-12mm/4-20mm. Drill bit sizes are laser etched and easy to drill.<br />
The stepped perforations are very clean and precise, the advantage is that it is also needed for different drilling sizes.<br />
Step drill bit set for the use of holes in a variety of materials such as cutting steel, brass, wood, plastic, etc.<br />
Perfect for home DIY and general supervision. During the work of the step drill bit, pour water to extend the service life effectively.<br />
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