You can have one made with a normal 5/16x14 pin and it will fit that shaft.
Joint size is 0.845"d. Shaft has a pilot measuring 0.160"h x 0.475"d.
Not sure if this correct.... I have the PB and PB II in stock but non of them fits on a stock 5/16x14 cue (Schon).
It might be that you have a US version without the stock Mezz joint...
guys i dont think he's talking about a regular mezz shaft. stuff like the hp2 wd700 etc. come with united joints that fit 5/16x14 cues but he's asking about the new break shaft. to my knowledge the break cue has a different joint so the insert for the break shaft is not a 5/16x14 thread. i could be wrong but i remember looking at klatt's breaker when he let me use it and i remember it being a different type of joint.
I fitted my Impact Pro shaft on a Schon and it fit fine as welli sold a mezz alpha shaft on here not too long ago. before i sold it i made sure it fit on a schon. i think blowfish is right on the money on this one