Just thought I would pass this along, I was looking for Allen drivers for working on the bike but I wanted all 1/4 drive. Snap on, Mac etc, they all jumped to 3/8 drive around 5mm. I found these and really like them. 2mm-10mm
http://www.vimtools.com/product_detail.asp?id=SHM400
http://www.vimtools.com/product_detail.asp?id=SHM400