Designed for use with electric rotary , the drill bit adapter allows for changes between different bits and attachments. This is particularly useful for detailed work like nut , where precision is key. Features -Color:Multi -Material:Copper -Size:2.30X1.40X1.40cm/0.90X0.55X0.55in (chuck) -Size:5.50X2.00X0.10cm/2.16X0.79X0.04in (wrench) -Size:1.60X1.10X1.00cm/0.63X0.43X0.39in (nut) -Size:1.70X0.60X0.60cm/0.67X0.24X0.24in (collets) - Nut upper hole diameter: 3.9mm - Clamping range: 0.5-3.2mm - Copper core specification: 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.4mm, 3.2mm, 3.4mm -Quick grinding: the electric rotary tool enables rapid and efficient grinding and , reducing and effort -Multimaterial compatibility: ideal for nut , and other materials, catering to different requirements -Accurate polishing: comes with drill bit adapter and polishing nut tool, providing precise polishing for fine product quality -Easy to carry: the small and lightweight size makes it convenient to transport and use in different settings -Durability: constructed from copper, resistant to wear, ensuring longtime use Package list: 2 x nuts 1 x chuck 11 cores 2 x wrenches