Description: Since it has exquisite workmanship and high quality, this product is very strong and hard to use, which is time-saving with its simple and convenient installation. With its wide application, this product can be used in most material such as metal and plastic, which has a long lifespan since it has strong sturdiness and durability. Made of high speed steel material, this product is wear-resistant and long lasting. There are two sizes that you can choose from: long, short. It is suitable for using on wood, copper, brass, aluminum, sheet metal and plastic. And it cannot apply for iron and steel materials since it is easy to break. Item Name: Drill Bits Material: High Speed Steel Features: Easy to Use, Convenient, Strong Hardness Size Details: Short Size: M3, Total Length: 5.4cm/2.1", Drill Bit Length: 0.6cm/0.2", Tap Length: 1cm/0.4" (Approx.) M4, Total Length: 5.4cm/105", Drill Bit Length: 0.8cm/0.3", Tap Length: 1cm/0.4" (Approx.) M5, Total Length: 5.7cm/2.2", Drill Bit Length: 0.8cm/0.3", Tap Length: 1.2cm/0.5" (Approx.) M6, Total Length: 5.7cm/2.2", Drill Bit Length: 0.8cm/0.3", Tap Length: 1.2cm/0.5" (Approx.) M8, Total Length: 6cm/2.4", Drill Bit Length: 1cm/0.4", Tap Length: 1.2cm/0.5" (Approx.) M10, Total Length: 6cm/2.4", Drill Bit Length: 1.2cm/0.5", Tap Length: 1.2cm/0.5" (Approx.) Long Size: M3, Total Length: 6.4cm/2.5", Drill Bit Length: 0.4cm/0.2", Tap Length: 1.3cm/0.5" (Approx.) M4, Total Length: 6.4cm/105", Drill Bit Length: 0.5cm/0.2", Tap Length: 1.4cm/0.6" (Approx.) M5, Total Length: 6.7cm/2.6", Drill Bit Length: 0.6cm/0.2", Tap Length: 1.6cm/0.6" (Approx.) M6, Total Length: 6.7cm/2.6", Drill Bit Length: 0.7cm/0.3", Tap Length: 1.8cm/0.7" (Approx.) M8, Total Length: 7cm/2.8", Drill Bit Length: 0.9cm/0.4", Tap Length: 2.9cm/1.1" (Approx.) M10, Total Length: 7cm/2.8", Drill Bit Length: 1.1cm/0.4", Tap Length: 2.3cm/0.9" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Drill Bits