Please read full description- these are not standard size, had a few people buy them and then moan, having not read in full.

Crank puller tool, new unused, unsure of make, looks sturdy and good quality. NOT standard fitting size, these are slightly bigger 26mm thread* - see below. Think they were used on some early vintage cranks and some later Campagnolo carbon ones & possibly Praxis Works - not 100%. 8mm allen key operates the threaded bolt and comes with a little cap thing for sticking in against bb axle if needed. Post next working day - FREE P & P.

Info from another ebay user:I believe this is for extractor threads which were damaged and then repaired with an oversize tap. I believe Cyclus uses M24x1 whereas Stein and VAR use M24x1.5 

I think the standard sizes are M22x1, M23x1, and M23.35x1 -- I am not aware of any cranks manufactured with over M24. (But it's certainly possible!)