Banggood Dear shashi bhushan, Thank you for choosing Banggood and sorry for the inconvenience caused. We have forwarded your feedback to our customer service team and will give you a proper solution within 24-48 hours.  If you have any other inquiries, please do not hesitate to contact us via these links: Personal Computer: http://www.banggood.com/Contact-Us_hi111. Mobile: https://m.banggood.com/contact_us.html We will do our best to assist you.  Best regards, Banggood Team

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homfabb Itis scrap for me too, also i can not remove from motor shaft, it stuck, now motor and er11 is scrap, i checked all size bits and collet, they all dancing. Unacceptable product, it has only one job to do= do not dance! The problem is; one of er11 and the other er11a

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banggood @homfabb Dear homfabb,
Thank you for choosing Banggood and sorry for the inconvenience caused.
Could you please tell us more information about your problem in these links?
Personal Computer: http://www.banggood.com/Contact-Us_hi111.
Mobile: https://m.banggood.com/contact_us.html
We will do our best to assist you after we receive the email.
Thanks for your understanding and have a nice day.
Best regards,
Banggood Team

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