You might also be interested in these rotary tool keyless chuck.
6% off
4486 4485 Multi Drill Chuck Collet Set 15Pcs for Dremel Rotary Tool | 0.5–3.2mm Shank Range, Brass Collet, Keyless Chuck Design, Quick Change Accessory, Compatible with Dremel 3000 4000 7700 8200
CVMGO
£ 6.29
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Omsscun 23PCS Multi Chuck Set 0.8-3.2mm Keyless with Nut | Brass Collets, Quick Change Rotary Tool Accessory with Metal Nut, Replacement 4486 & 4485 Kit, for Dremel Compatible