Adopting high speed steel material and going through meticulous process， this 13pcs 1/1.5/2/2.5/3mm HSS Titanium Coated High Speed Steel Drill Bits Set features the moderate hardness， high wear resistance and good durability. It has a wide application， such as angle iron， common metal， aluminum， copperware， plastic and wood etc. With this drilling bit， it will be much easier to punch holes. Also， those high-hardness material such as stainless steel is not recommended. If you want to have more labor-saving punching， do not miss the chance!                                    Features             Tiny HSS drill bits， offer the best heat resistance and good performance for drilling<br> Good toughness， wear resistance， strong drilling capacity<br> Suitable for wood， aluminum， plastic， etc.<br> Precise， accurate and efficient<br> Orientation department has orientation and ground effects<br> Spiral chip groove to guide crumbs   <br>                                                            Specifications             Color     Brown    <br> Weight     28.22oz / 800g    <br> Dimeisons     (5.51 x 3.54 x 0.11)" / (14 x 9 x 0.3)cm (L x W x H)    <br> Material     High Speed Steel       <br> Special Function     PCB Drilling         <br> Size     1.5mm，2mm，2.5mm，3mm，3.2mm，3.5mm，4mm，4.5mm，4.8mm，5mm，5.5mm，6mm，6.5mm    <br> Suitable for     Wood， Aluminum， Plastic or Other Materials    <br> Shape     Straight Shank    <br> Quantity     13 pcs       <br>                                                             Package Includes            13 x Twist Drill Bits<br>