0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. Please confirm the size you actually need before buying One-piece structure design, high-quality material, sturdy and durable, superior to plastic models. The 3-jaw chuck is precision-made, and the collet is stable and durable This replacement brass collet provides a big improvement in performance and holds these tiny bits more securely and in better alignment with the axis of the tool Compatible with all rotary tools and flex shafts. Not compatible with discontinued Models 1, 2, and Series 1 or earlier versions of discontinued Models 260, 270, and 280 Color: Gold + silver + black Material: Metal Package Contents: 8 x Brass 4485 Collets (0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm) 2 x Metal replacement collet nuts 1 x Keyless Chuck Only the above package content, other products are not included Note: Light reflection and different displays may cause the color of the item to appear slightly different from the real thing. Measurement allowed error is +/- 1-3cm