Crafted from copper, this chuck collet offers exceptional strength and longevity. The four-jaw design ensures a firm hold on your drill bits, preventing slippage during operation. suitable for intricate crafting, grinding, and drilling tasks, it allows for precise control and smooth operation, making it an essential addition to your toolkit. Features -Color:Assorted Color -Material:Metal -Size:2.20X1.50X1.50cm/0.86X0.59X0.59in (Size 4486 chuck) -Size:1.50X1.10X1.10cm/0.59X0.43X0.43in (Size 4485 nut) -Size:1.60X0.60X0.60cm/0.63X0.24X0.24in (Size copper core) -Stable work piece holding: precision clamping design for secure work piece positioning, improving processing accuracy -Efficient heat dissipation: copper core structure provides thermal conductivity, effectively dissipating heat and prolonging life -Adaptable lock nut: lock nut accommodates different work piece diameters, enhancing versatility -Performance: suitable for intricate tasks like metal grinding, catering to professional needs -Design: compact structure and easy operation make it ideal for both diy enthusiasts and industrial use Package list: 2 x nuts, 1 x chuck, 10 core, 2 x wrench