Brian McGarvey wrote: > > 13mm Hex. duck tape a triple square in a 13mm socket and and unscrew em.. > brian > Yeah I thought 11 mm was a little small. Hold on, I have a head in the bedroom (only kind lately) TMI!... Confirmed inside diameter is 13 mm hex. Spin em out and swap. Be aware some types are a two piece and the inside part being something like a bakelite might well break during removal. TBerk