Precision bit alignment: Each holding slot includes a dedicated bit positioning hole, and the movable, reversible module lets you align the drill quickly by adjusting for different rod thicknesses, improving setup efficiency. Stable, deviation drilling: The design prevents drill deviation whether you are working with soft or hard components, ensuring consistent hole placement. Adjustable clamping tension: Rotating the tightening screw lets you set the clamping force to securely grip round rods. Wide compatibility and quick adaptation: Accommodates round rods from 1 mm to 4 mm in diameter. The adjustable sliding module allows you to modify the drill position without switching locators, enabling rapid size changes. Use scenarios: 1) Jewelry and model making: drilling precise holes in small round rods (1–4 mm) with repeatable accuracy. 2) Electronics assembly and prototyping: fast setup for drilling different rod thicknesses without relocating fixtures. 3) Small mechanical assemblies: reliable grip and quick drillposition changes when working with varying rod sizes.