Long HSS Drill Bits | 150mm Length | 5-Piece Set for Wood, Aluminum & Plastic

This 5-piece extra-long HSS drill bit set is engineered for precision drilling in hard-to-reach areas. The 150mm length and high-speed steel construction provide superior reach and durability for wood...
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Questions about this product
- Will these extra-long bits work with my standard hand drill, and what can I cut?
- Yes, they feature standard straight shanks that'll fit standard three-jaw drill chucks. You can use them to drill through wood, plastics, and soft metals like aluminum. Avoid using them on masonry or hard steel, as this will quickly dull the cutting edges.
- What are the exact sizes in this set, and how deep can they drill?
- The set includes five bits with diameters of 2mm, 3mm, 3.5mm, 4mm, and 5mm. Every bit in this set measures 150mm in total length. The usable spiral flute length is about 100 to 110mm, which determines your maximum drilling depth.
- How do I prevent these long, thin drill bits from bending or breaking?
- Run your drill at a moderate speed and apply light, steady pressure. For the 5mm bit, keep your speed around 3000 RPM or lower. Pull the bit back frequently to clear wood chips or plastic shavings from the deep hole.
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