5 PCS Extra Long Twist Drill Bits, 150 mm High Speed Steel Wood 2MM 3MM 3.5MM 4MM 5MM Hardness Spiral Bit Straight Shank Set for Drilling Tool Metal

PREMIUM HIGH SPEED STEEL CONSTRUCTION: These extra - long drill bits are crafted from high - quality high - speed steel (HSS), offering exceptional hardness, wear resistance, and durability. Compared to ordinary drill bits, they have a significantly longer service life, making them a reliable choice for various drilling tasks. OPTIMAL LENGTH FOR DEEP DRILLING: With a length ranging from 150mm to 160mm, these drill bits feature an extra - long cutting edge. This design enables them to drill deep holes efficiently and speeds up the drilling and chip removal process, ensuring smooth operation even in challenging applications. EFFORTLESS DRILLING PERFORMANCE: The sharp, twisted drill bit design, combined with a chip - removal feature, makes drilling easier and more effortless. The unique shape helps to reduce friction and prevent clogging, allowing for a more efficient and precise drilling experience. VERSATILE SIZE SELECTION: The set includes five different drill bit sizes (2mm, 3mm, 3.5mm, 4mm, and 5mm), providing you with the flexibility to choose the most suitable bit for your specific project. Whether it's a small - scale or large - scale job, you'll have the right tool at hand. WIDE APPLICATION SCOPE: These drill bits are suitable for a wide range of materials, including wood, metal, aluminum, plastic, rubber, and even automobile spring steel and die steel. They are compatible with most electric drills, making them a versatile addition to any toolbox.