The wrench is a Sealey AK628, it's brand new and only torqued up the o side. I called up the distributor I bought it from and he told me the torque only works one way there's no push through to reverse the wrench and the flip switch only engages the opposite ratchet, seems a bit pointless as I'm not using it as a breaker bar, thanks for the offer to borrow a wrench and for posting the model that is reversible. I'll try and borrow one from a local garage or get them to torque it up and if I get stuck I may well take up the offer to borrow one. Don't fancy standing on the bar, I'm just over 200ib and gymnastics isn't my forte, had thought of standing on the bathroom scales and reducing the reading by 100lbs and holding the breaker bar 2 foot from the socket. Changing the discs, calipers and brake lines has been more of a task than I'd expected.