efficient reaming and drilling:This step drill bit combines reaming and 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 and maintaining accuracy, and it guarantees professional-grade results in plumbing and DIY projects. universal hex shank design: Featuring a hexagonal shank design, it is compatible with a wide range of hand drills and lithium drill equipment, providing versatility and ease of use. high-quality materials:Constructed from high-quality materials, this bit is wear-, , and to withstand abrasion and , ensuring and reliability. wide application range:Suitable for drilling water pipes, PPR pipes, PVC pipes, plastic pipes, and pipes, making it an essential tool for plumbers, contractors, and DIY enthusiasts alike. notes to use at recommended speeds and with appropriate safety gear. Keep out of reach of children. Colour:gold (The actual product may have slight color difference or difference, which 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 and 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.