H&R sight mount.

[Calfed]

I'm trying to mount a Viani scope mount on one of my M12's and am having difficulty identifying the fasteners that are holding the base on.

The fasteners have a round hole withwhat looks like a start shape in the bottom.

What kind of tool do I need to remove these fasteners?

Thanks

 

[earlm]

Tork?.......................................................(sp)..............................................

 

[Calfed]

Thanks...T10 Torx got it.