Features 1、Twist drill bits are made from high-speed steel for high hardness and durability 2、This set includes 8 pieces drill bit in different sizes of the most popular drill bits 3、Extra long cutting edge allows you using these bits to drill deep holes 4、They are great for most drilling jobs and soft materials such as aluminum, wood, plastics 5、Sharp twisted drill bits will make the drilling easier and more effortless. Specification Features: Twist drill bits are made from high-speed steel for high hardness and durability. This set includes 8 pieces drill bit in different sizes of the most popular drill bits. Extra long cutting edge allows you using these bits to drill deep holes. They are great for most drilling jobs and soft materials such as aluminum, wood, plastics. Sharp twisted drill bits will make the drilling easier and more effortless. Specifications: Material: High-speed steel Type: Twist drill bit Diameter: 4mm, 4.2mm, 4.5mm, 5mm, 5.2mm, 6mm, 8mm, 10mm Length: Approx. 200mm Package Includes: 8 x Drill Bits Package List