Why is Defensive Holding only a 5 yard penalty?

[Roughneck]

That's always bothered me. I know an auto first down goes along with it but 5 yards is too light. It should be 10, just like on Offense.

 

[Hollywood Henderson]

Good point...

 

[NickZepp]

Yep holding should be 10 and illegal contact should be 5. It's an automatic FD anyway that's all that matters.