Material of the product: the small drill bits are made of HSS high speed steel, , solid and durable, and will not be damaged after long-term useProduct packaging: the package contains 40 pieces fully ground high-speed steel mini twist drills in , With sufficient , these beautiful and elegant drills can meet your needs and are easy to useScope of application: small drill bits fit for woodworking drilling, electronic product maintenance, household repair, can drill boards, plastic products, circuit boards and so onWarm reminder: do not drill for hard metal materials, and check the size information purchasingColor: silvermaterial: metalMini HSS Twist Drilling Bit Straight Electrical Drill Tool.Twist Drill Metric Hss Drills Mini Drill Bits.Mini Mini HSS Twist Drill Bit Set 0.5mm-2.0mm Model CraftStraight Twist Drill Bit.Suit for:PCB, Thin Aluminum/Iron Sheet, Thin plank, Plastic: straight Size:10pcs 0.5mm10pcs 1.0mm10pcs 1.5mm10pcs 2.0mmPackage Contents:1 set * Straight Twist Drill BitsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.