In the Spring 2007 Woodworking Magazine they did a review of mortise bits from the 34.99 to the 341.00 sets.
The ones by Hartville Tool came in 2nd and they were 34.99 for the set of 4 chisels. They have a 5/8 shank. The bits are 1/4, 5/16, 3/8 and 1/2.
The ones rated as #1 were by Woodcraft also 34.99 but I can’t find them on their web site The product code was #144010
They are now on sale at Hartville for $17.48
They are in their closeout section so I don’t know how many or how long.
-- I've been blessed with a father who liked to tinker in wood, and a wife who lets me tinker in wood. Southern Delaware firstname.lastname@example.org †