Specifications: Made of high quality carbon steel material, it is wear-resistant and easy to use. Processing by heat treatment and precise grinding, this collet chuck is durable to use. It is widely used in milling, drilling, engraving, CNC, spindle machine and other clamping tools. Item Name: ER32 Collet Material: Carbon Steel Accuracy: 0.05 Model: ER32 Product Specifications: 3mm/4mm/5mm/6mm/7mm/8mm/9mm/10mm/11mm/12mm/13mm/14mm/15mm/16mm/17mm/18mm/19mm/20mm Features: Durable, Wear-resistant, Collet Chuck Size: 4cm x 3.3cm x 3.3cm/1.57" x 1.30" x 1.30" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x ER32 Collet