You might be able to get enough purchase with a mole wrench. Or cut some flats into the pinhead with a Dremel.
@mr_tom started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
You might be able to get enough purchase with a mole wrench. Or cut some flats into the pinhead with a Dremel.