<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><br>✅ 【HSS Steel has excellent durability HSS/ High speed HSS Steel (hss-4241), the surface treatment is a drill bit of titanium coating, excellent in heat resistance, abrasion resistance, and sharpness. Can be used for thin iron plate, aluminum plate, plastic, etc. The work of the hole, the hole of the hole, the chamfering, and the burr taking is possible with this set.<br>✅ 6 "step drill" is a convenient item to open various drills. Because it can correspond to multiple hole diameters, it is not necessary to prepare multiple drills even if various hole diameters are necessary, and work efficiency is improved. In addition, because the tip of the tip is cutting material, vibration and burr occurrence are small, finish is good. This reduces the working time.<br>✅ Wide use DIY When I open the hole of different size, it is troublesome to put the hole in the hole of different size. A convenient drill is a step drill.<br>✅ It is a step drill which is excellent in durability and dustproof. Economically useful if you can work with less tools.<br>✅ Step drill 3 piece mm ~ 12mm+9 Step drill mm ~ 20mm+15 Step drill mm ~ 32mm）＋ Twisted bit 3 piece (3mm, 6mm, 8mm) + Case<br><br><span style="font-size:20px;"><span style="font-family:Comic Sans MS,cursive;"></span></span></div></div>