Specifications: This 10 pcs white steel drill bits are for DIY grinding and punching (wood, metal, mold polishing purposes). These are high quality white steel drill bits for electric grinding accessories. Can be used for drilling, such as metal, plastic, aluminium and wood. High working efficiency, perfect punching effect and long using life. Convenient to drilling, simple to use, safe and reliable. Widely used in precision punching technology and slotting. Item Name: Twist Drill Bit Set Material: Steel Quantity: 10 Pcs/Set Features: Durable, Universal, High Speed, Thin, Tool Kit Diameter: 0.5mm/0.019", 0.6mm/0.024", 0.8mm/0.031", 1.0mm/0.039", 1.2mm/0.047", 1.5mm/0.059", 1.8mm/0.071", 2.0mm/0.078", 2.5mm/0.098", 3.0mm/0.118" (Approx.) Length: 23mm/0.91", 29mm/1.14", 34mm/1.34", 35mm/1.38", 43mm/1.69", 49mm/1.93", 51mm/2.01", 51mm/2.01", 60mm/2.36", 61mm/2.40" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 10 x Twist Drills