I have just bought this tool and can't see any instruction of how to open it (no chuck key point)so I can fit one of the tools in- can anyone help?? Thanks!

SOURCE: nokia 7380 fix !

See this post for information:

http://brokenappliance.blogspot.com/search/label/Nokia%207380

SOURCE: i need a chuck wrench/tool for a duracraft drill press

Are you talking about the chuck key? That's the little wrench with a collar of gear teeth on it.
There are only a few standard sizes plus a couple of odd-balls. Last time I looked, Sears carried a good selection. If you have the old one, take it with you to the store. If you don't have the old one, find a way to measure or approximately measure what you need. Another chuck key that doesn't fit can be a useful reference. If you can find something (maybe a drill bit) that is a close fit into one of the three holes in the chuck, that can be useful too.

SOURCE: how do i remove the chuck from dewalt dc925

The dc925 and the current model dcd950 along with several other models of Dewalt 's line of cordless hammer drills DO NOT have a screw inside removal requires a CHUCK REMOVAL FIXTURE part #
233804-40 also you can't use a generic replacement chuck. As of 2/2/2010 the prices on the Dewaltservicenet web site are $72.74 for
the tool and $69.70 for the chuck, part # 330075-90.

SOURCE: Need fitting instructions for Nokia E63 replacement full housing.

get through your user manual provided with thw purchase of your mobile phone.you can find the instruction for replacement of housing....better to get a help of trained service engineer

SOURCE: dremel moto tool model 395 coupling from motor to

The part that goes between the motor and the chuck is called the CLUTCH UNIT,
REF 2615294309 it is a splined rubberised sleeve, it also fits the 276 and 396.
The price is £3.69 (including vat at17.5%) and can be obtained from Jaymac (Derby) Ltd.
http://www.dremel-direct.com/acatalog/service.html