Snapped chain whip

So I was trying to take off my sprocket last night and one of the bolts connecting the chain to the handle snapped in two.

Is my sprocket on too tight?! Now what? Rotafix method wouldn't shift it either - or because I was wincing at the noises my bike was making as I was attempting this..

Bugger.

Is my sprocket on too tight?!

Acknowledging that I may be jumping to assumptions - no, your chainwhip just isn't good enough.

I have a Var whip at home and Park ones at work and whenever I'm not in either of those places and have to use someone else's I'm shocked by how flimsy some whips are.

I think my Var whip came with 3/32" chain so I swapped it for some 1/8" straight off and I enlarged the hole where it attached so that I could use a split link to attach the chain so it could be repaired easily but I don't think I've had to do so yet.

No fault to presume :)

I have (or did have) a Park Tool SR18, I kid you not, this was the first time using it..

No fault to presume :)

I have (or did have) a Park Tool SR18, I kid you not, this was the first time using it..

That's what we have at work, one of them and one SR11 I think - can't remember which is which but a geared one and a ss one. Both running 1/8" chain now as we work on 99% track bikes. I think I've used a joining link on whichever one I had to change the chain on - come to think of it, possibly both our Park ones using joining links now as I think I remember lending one of them out and it coming back broken.

Never really got why they use such a narrow bolt when using a joining link is so easy.

I'm just going to take it to my LBS so he can use his vice.

I hope the store I bought the chain whip from will let me exchange!

Snapped an Izumi chain last week with one of these ^

What make is that, wools?

It's a Shimano DA jobbie