Value CombinationPackage includes 25*mini twist drill bits, 10*PCB drills, 1*hand drill, enough to meet your different demands. PCB Drill: Made of premium tungsten steel, sharp, durable and efficient, suitable for processing materials such as PCB, SMT, CNC, mold, sculpture, plastic, copper, stainless steel, etc. Mini Hand Drill: The mini twist drill is made of HSS 4241 steel, lightweight, durable, ready for precision work, suitable for finishing jewelry, resin, amber, walnut, PVC, rubber, plastic, model and more. Hand Drill: Made of high quality aluminum alloy, the hand drill is sturdy and durable. The adjustable chuck is compact with the offered drill bits and grip them firmly, convenient to use. Optional Size: The twist drill bit size includes 0.5/ 0.6/ 1/ 1.2/ 1.5/ 1.8/ 2/ 2.35/ 3mm, and the PCB drill bit includes 0.1/ 0.2/ 0.3/ 0.4/ 0.5/ 0.6/ 0.7/ 0.8/ 0.9/ 1mm, you can choose the suitable drill bit according to your need. Product Description SpecificationMaterial: Twist Drill Bit: HSS 4241 PCB Drill Bit: Tungsten Steel Micro Drill Bit: Aluminum Alloy Color: As the picture shows Size: As the picture shows Lightweight tool, easy to carry and store, you can put them in the tool box or storage bag. Sufficient quantity and various optional sizes, meeting your different demands. TIP: Please check the product size before ordering. Our product is not suitable for children under 3 years old. Please contact us if you have any questions. Package includes: 25 x Mini Twist Drill Bits 10 x Mini PCB Drill Bits 1 x Hand Drill Sold by the store