SIZE ALLEN KEY : What size of allen key do i need for the clamps ?

What size allen key do I need ?

The size of the allen key depends on the clamps, there are divided in two.

For clamps size A27 (3/4') and B34 (1') :
The allen key needs to be size 1/4' , but in most shops you will find 6mm as standard. This is not ideal for fastening the clamps properly. 

For clamps size C42 (1 1/4'), D48 (1 1/2') and E60 (2') :
The allen key need to be size 8mm.


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