A 15/16 socket fits the nut on my Ridgid bs perfectly. I don't know about
the bolt because there isn't room to get a socket on it and I don't have a
wrench that big. You might want to bring along visegrips or channellocks in
case it spins on you.

Btw, if you happen to live near SE Michigan my 4 month old Ridgid is for
sale and includes the riser and the herculift base.

John