Features: This 6 piece long spirals hexagonal shank drill bit set features an extended shaft that effortlessly penetrates thick wood, eliminating the need for frequent bit swap during deeply drilling operations. Designed with a hexagonal anti slip for secure grip and multiple sizes covering mainstream diameters, it boasts marine grade for superior durability and reduced chipping on hard substances like alloys. Tailored for hobbyists and professional craftsmen, this versatiled set meets the demands of both casual home projects and rigorous job applications. Ideal for narrow deeply hole scenarios such as ship repairs and building trusses, as well as drilling into metal frames and hardwoods, it enhances efficiency for home workshops and construction site. The standard hexagonal shank ensures seamless compatibility with most cordless drills and impacts driver, enabling quick bit changes without adapters to streamlines workflow and boosting productivity. Specifications: Component：high strength carbon steel Parameters: Extended design; Hexagonal handle anti-slip structure Dimensions: refer to the dimension chart,12in length suitable for standard hexagonal drill clamps Attributes: 6piece set Note: Need to be used with an impacts drill/electric drill | Avoid drilling hard metal materials Package Includes: 6pieces/Set Hexagonal shank spirals drill bits note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution