Diamond Step Drill Bits

Upgrade your drilling projects with our multilayered cone reamer, designed for efficient and accurate hole expansion. Available in three sizes—20mm (0.79"), 35mm (1.38"), and 50mm (1.97"), this tool enables quick and precise hole enlargement, significantly improving work efficiency.

Crafted from high-quality materials, the multilayered structure allows smooth, gradual expansion, making it ideal for a wide range of applications. Whether you're working with concrete, tile, marble, or engineered stone, this cone reamer ensures clean results across different materials.

With an M10 thread and 12mm (0.47") height, it easily fits standard tools and grinders. Perfect for workers, technicians, and enthusiasts in the machining and construction industries, this hole expansion tool is a practical and reliable choice.

From DIY tasks to professional projects, our cone reamer enhances performance and accuracy—making manual hole enlargement a thing of the past.