These step drills are very suitable for cutting holes in a variety of materials including steel, brass, wood, plastic and more.<br /><br />Features:<br />Titanium coated to reduce friction and heat.<br />High-speed steel step drill, nice quality and durable.<br />These drill bits works great in making a smooth, clean and perfectly round hole.<br />Suitable for punch holes through sheet metal, steel plate, aluminum plate, brass or wood.<br />This drill bit set includes 3 sizes(3/16-1/2&quot;, 1/8-1/2&quot;, 1/4-3/4&quot;), which meet your different needs perfectly.<br /><br />Specifications:<br />Material: High-speed steel 4241<br />Surface Treatment: Titanium coated<br />Shank Diameter: 6.35mm (hexagon shank)<br />Item Weight: Approx. 92g / 3.24oz<br />Package Weight: Approx. 93g / 3.28oz<br />Package Size: Approx. 9.5 * 6 * 2cm / 3.74 * 2.36 * 0.79in<br /><br />Package List:<br />3 * Step Drill Bit<br><img src="//agdetail.image-gmkt.com/m430/173/087/827087173/img/agdetail.image-gmkt.com/173/087/827087173/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/0/E1450/E1450-1-8570-BZa8.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/173/087/827087173/img/agdetail.image-gmkt.com/173/087/827087173/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/0/E1450/E1450-1-8570-zMDg.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/173/087/827087173/img/agdetail.image-gmkt.com/173/087/827087173/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/0/E1450/E1450-1-8570-uyYG.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/173/087/827087173/img/agdetail.image-gmkt.com/173/087/827087173/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/0/E1450/E1450-1-8570-cwzR.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/173/087/827087173/img/agdetail.image-gmkt.com/173/087/827087173/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/0/E1450/E1450-1-8570-OAK7.jpg" /><br>