t4 allen key size
 

I'm trying to the bit on the front of the can that holds the bits metal which hold the front arms in place so I can change the front arm as I have broken it. they are two little allen screws but none of mine fit allen keys fit,what is the right size

is it a tiny little allen??? if it is its .050 mate

Yes mate its a small one
Where can I get one from

somewhere like screwfix if you want one asap or your LHS

Got some of these left if your interested. You will only need a 5/64 driver on these. Part of a kit but they are 2 stainless steel bulkhead screws so they are strong.
http://www.oople.com/forums/showthre...563#post432563

only 7 sets left

Will they fit in the hinge pin holder as well?????

If you mean the bulkhead then yes. The 2 stainless ones do that job so you get good leverage.