Mine are longer @12" most of the others are @8" long & that makes easer to use.
this is a tool that everyone should have, once you have lapped some rings you will see how bad most of them are! even some of the high end rings.
at this time I am not selling lapping compound, I use valve lapping compound found at most autoparts stores.
I have a few left & will not be making them any more.
I prefer check & take pay pal todd@ttshooter.com
price
$28 shipped to usa