Vogels Projector Mount - Special Allen Key

[Max Payne]

Need to tighten the rotation bolts on my vogels mount and can't find the special allen key that came with it ...and can't use a normal allen key as the bolts used for the vogels mount are special allen key's



i.e. the allen key needs to have a "hole" in it. If anyone knows what Im taking about and knows where I could get a spare one or alternative I know there is a special name for them in the hardware world?

Help much appreciated!

[Trollslayer]

Torqx security bits by the look of it, they are also star shaped instead of just hexagonal.
You should be able to getas cheap set at B&Q.

[Max Payne]

Excellent, they are the ones!!

Thank you very,very much for your help, its very much appreciated and a great help!