It's generic, so you might be able to find it cheaper elsewhere, but HubJub are nice enough people that I CBA to spend time trying.
I use a Shimano TL-SR20 lock ring wrench but the Shimano chain whip is rank, so I bought Park SR2 chain whip and rebuilt it with extra long Wippermann 1R8 chain. It's pricey, but your knuckles will thank you for getting the workshop tool rather than short, cheap, thin trackside versions. Without the need to combine 2 tools in one, the Park HCW-17 would be a better and cheaper lock ring option.
Chain tool:
http://www.hubjub.co.uk/index.php/store/tools/deluxe-chain-tool-detail
It's generic, so you might be able to find it cheaper elsewhere, but HubJub are nice enough people that I CBA to spend time trying.
I use a Shimano TL-SR20 lock ring wrench but the Shimano chain whip is rank, so I bought Park SR2 chain whip and rebuilt it with extra long Wippermann 1R8 chain. It's pricey, but your knuckles will thank you for getting the workshop tool rather than short, cheap, thin trackside versions. Without the need to combine 2 tools in one, the Park HCW-17 would be a better and cheaper lock ring option.