Help Please

[pollyanna]

For obvious reasons (losing Willow this morning) my brain is mush and I want to finish a quiz and need one more answer. It has to be in by 9 pm, so any help much appreciated from you clever lot

What am I?

a) if you push, I go in

b) you have to pull hard to get me out

c) I'm useful against a wall

All clues relate to the one thing and I haven't any idea?? Can anyone help me?

Thanks so much,

 

[Janimal]

a Plug......??

 

[Janimal]

A drawing pin ?? :blink:

is it so many letters Janet???

 

[Trish]

drawing pin???

 

[pollyanna]

A drawing pin ?? :blink:
is it so many letters Janet???

<{POST_SNAPBACK}>

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No, just the 3 clues to one object or thing or even person!!

I thought of a doorbell but not sure about it fitting all 3 clues - what do you think??