Fangrui Product Details Most Of The Collets Used In The Market Are Made Of Aluminum Alloy. This Material Is Soft And Easy To Wear And Tear, So We Use A Better Quality Brass Material. For Plastic Nuts, They Will Break During Use, And The All-metal Material Solves This Quality Problem Very Well. Compatible With All For Dremel Rotary Tools And Dremel Flex Shaft. But Except Discontinued Models 1, 2, And Series 1 Or Earlier Of Discontinued Models 260, 270 And 280. This Brass Collet Provides A Big Improvement In Precision And Holds These Tiny Bits Far More Securely And In Better Alignment With The Rotation Of The Tool, Under High-speed Rotation, It Not Only Maintains Stability But Also Improves Work Efficiency. The Package Contains: 8pcs Brass 4485 Collet (0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm) And 2pcs Metal Change Collet Nuts. Colour:yellow Material:brass Package Contents: 1 Set * For Dremel Collet Set Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Differe