They're a lot of mini chuck or micro chuck you can buy anywhere like amazon.
http://www.amazon.com/SE-Micro-Chuck-inch-shank/dp/B001NQP8HU%3FSubscriptionId=AKIAJ2KCCSRYBYAUNNMA&tag=affilamazo0da-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B001NQP8HU]Amazon.com: Micro Chuck 1/4 inch shank: Home Improvement
1-3mm Mini Micro Drill Chuck Pin Vise Set 1/4" Shank | eBay
Or look for Dremel chuck, very inexpensive.
Hope this help.
And don't use anything that is not balanced to high speed.