Condition: 100% Brand New_x000D_ Item Type: Drill Bit Collet Stoage Kit_x000D_ Material: Plastic + High Speed Steel_x000D_ ER11 Chuck Size: Approx. _x000D_ 1mm / 0.04in_x000D_ 1.5mm / 0.06in_x000D_ 2mm / 0.08in_x000D_ 2.5mm / 0.1in_x000D_ 3mm / 0.12in_x000D_ 3.5mm / 0.14in_x000D_ 4mm / 0.16in_x000D_ 4.5mm / 0.18in_x000D_ 5mm / 0.2in_x000D_ 5.5mm / 0.22in_x000D_ 6mm / 0.24in_x000D_ 6.5mm / 0.26in_x000D_ 7mm / 0.28in_x000D_ 1/4in_x000D_ 1/8in_x000D_ ER20 Chuck Size: Approx. _x000D_ 1mm / 0.04in_x000D_ 2mm / 0.08in_x000D_ 3mm / 0.12in_x000D_ 4mm / 0.16in_x000D_ 5mm / 0.2in_x000D_ 6mm / 0.24in_x000D_ 7mm / 0.28in_x000D_ 8mm / 0.31in_x000D_ 9mm / 0.35in_x000D_ 10mm / 0.39in_x000D_ 11mm / 0.43in_x000D_ 12mm / 0.47in_x000D_ 13mm / 0.51in_x000D_ 1/4in_x000D_ 1/2in_x000D_ 1/8in 1There are different sizes of holes on the storage box, suitable for different sizes of chucks. 2Reasonable space layout, easy to put drill bits and find tools you need, bring you convenience. 3Adopts high quality plastic material, safe and eco?friendly, stable and durable. 4Equipped with chuck of different specifications, good performance, meet your different needs. 5Keep your tools organized, a set of tools are available for use, help improve your working efficiency. 1 x Storage Box 16 x ER20 Chuck 15 x ER11 Chuck 31 x Chuck Barrel 1. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.