Features: This drill chuck set is made of copper with excellent workmanship. The collets can go with drill as a mini hand drill for ABS board, aluminium sheet, paperboard drilling. Drill collet only, other accessories in the picture is not included. Specifications: Material: copper Color: golden Drill collar size: 0.5mm, 1.0mm, 1.5mm, 2.5mm, 3.0mm Hole diameter: 2mm/2.35mm/4.05mm/5.05mm Length: about 27.87mm Diameter: about 9.29mm Quantity: 1 set Package includes: 1 x Axis 1 x Wrench 1 x 0.5mm Drill Collet 1 x 1.0mm Drill Collet 1 x 1.5mm Drill Collet 1 x 2.5mm Drill Collet 1 x 3.0mm Drill Collet Notes: Transition: 1cm=10mm=0.39inch 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement.