Material of the product: the small drill bits are made of HSS high speed steel, reliable, solid and durable, and will not be damaged easily after long-term use Product packaging: the package contains 40 pieces fully ground high-speed steel mini twist drills in total, With sufficient quantity, these beautiful and elegant drills can meet your needs and are easy to use Scope of application: small drill bits fit well for woodworking drilling, electronic product maintenance, household repair, can drill boards, plastic products, circuit boards and so on Warm reminder: please do not drill for hard metal materials, and check the size information before purchasing Description: Color: silver material: metal Mini HSS Twist Drilling Bit Straight Shank Electrical Drill Tool. Twist Drill Metric Hss Drills Mini Drill Bits. Mini Mini HSS Twist Drill Bit Set 0.5mm-2.0mm Model Craft Straight Shank Twist Drill Bit. Suit for:PCB, Thin Aluminum/Iron Sheet, Thin plank, Plastic Shank: straight shank Size: 10pcs 0.5mm 10pcs 1.0mm 10pcs 1.5mm 10pcs 2.0mm Package Contents: 1 set * Straight Shank Twist Drill Bits Only the above package content, other products are not included. Note: Light shooting 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.