User Manual for DEPSTECH models including: DM180 Advanced Totary Tool, DM180, Advanced Totary Tool, Totary Tool, Tool
DEPSTECH Rotary Tool Kit, 180W Wood Carving Tools with Keyless Chuck and Flex Shaft, 6 Variable Speed 10000-40000RPM, 128pcs Accessories Multiuse Set for Engraving/Handmade/Crafting Projects/DIY : Tools & Home Improvement
Retighten collet nut and run the rotary tool. You should be able to judge by the sound and feel if the accessory is running in balance. Continue adjusting ...