PACKAGE INCLUDES: Brass 4485 collet in 10 sizes for : 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm. 1 metal replacement collet nut and 1 wrench. COMPATIBILITY: Compatible with all for tools and for flex shaft, excluding 1, 2, 260, 270, 280 series, and 1 series earlier models 3000 and 4200. HIGH-QUALITY MATERIAL: With brass collet and full metal nut, they are of better quality, more durable, and effectively prolong the service life. PRACTICAL TOOL: The replacement of the brass chuck greatly improves the accuracy and can fix the tiny drill bit more safely. Under high-speed rotation, the tool is better aligned, maintaining stability and improving work efficiency. NOTE: There are 10 different sizes of the copper collet. Please confirm the size you need before buying. Colour: Gold+Silver Material: Brass Package Contents: 1 set * Router Collets Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.