An image for 'anyone':
View attachment 733258
"The
Shimano TL-PD300 tool replaces
TL-PD33 and, like its predecessor, is used to adjust the pedal cone. It consists of two parts and is characterised by particular stability thanks to hardened steel.
TL-PD300 can be used for pedals that have a 7 mm lock nut and a 10 mm cone."