efficient reaming drilling:This step drill bit combines reaming drilling functions into one, allowing you to efficiently create clean, precise holes in pipes. limit swivel groove:The innovative design ensures precise hole openings, preventing over-drilling maintaining accuracy, it guarantees professional-grade results in plumbing DIY projects. universal hex shank design: Featuring a hexagonal shank design, it is compatible with a wide range of h drills lithium drill equipment, providing versatility ease of use. high-quality materials:Constructed from high-quality materials, this bit is wear-, , to withst abrasion , ensuring reliability. wide application range:Suitable for drilling water pipes, PPR pipes, PVC pipes, plastic pipes, pipes, making it an essential tool for plumbers, contractors, DIY enthusiasts alike. notes to use at recommended speeds with appropriate gear. Keep out of reach of children. Colour:gold (The actual product may have slight color difference or difference, which will not affect the use) Material:steel Size: diameter 20mm, 25mm, 32mm Package Contents: 3 x Step Drill Bit Set(15-19,18-24,24-31) Only the above package content, other products are not included. Note: Light reflection different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.