<p>Product Description<br />5PCS Step Drill Bit<br />Step Drill Bit<br />Material<br />&lrm;Steel High Speed, Titanium Brass, High Speed Steel, Alloy Steel Brass, High Speed Steel, Alloy Steel,Titanium &lrm;Brass, High Speed Steel, Alloy Steel<br />Color<br />Silver<br />Drill Shape<br />Step Drill Bit <br />Size<br />5mm-35mm<br />Flintronic 5-35mm Large Size Titanium Coated Trephine Bur, HSS, Spiral<br />1.If you need a storied forest very satisfied, stop, this is what you need.<br />2. is used made of HSS high speed steel, the titanium alloy liner, durable.<br />3.It is very suitable for to use to punch holes in a variety of of materials such as steel, brass, wood, plastic, thin iron plate, aluminum material, insulation plate, PVC plate, etc.<br />Widely used; and concerned:<br />Compatible models, bench drill, bench drill; hand, rechargeable drill.<br />Tapered is suitable for drilling larger and deeper holes, or for the widening of the opening in the zones where he was drilled.<br />Cutting blade design enables faster cutting, automatic deburring of the hole when drilling.<br />Advantages: 1. Use twist drill : pre-drilling by drilling step by step not, reduce the damage to the workpiece during drilling. 2. CNC machine tools, each process is strictly controlled; and each step of quality control. 3. Compare to the twist drill, the stepped drill; is not easy to break and can cut different size holes. two flutes: The capacity chip removal is better and the drilling speed is accelerated. Improve your productivity.<br />Attractive design and practical home improvement and general building monitoring / technology.<br />Long life The punch of centering is made of alloy steel. impact resistant for easy positioning before drilling and breaking glass. Positioning and pre-drilling to protect the conical drill bit.</p>