Parallels - what are the differences?

[bobm4360]

Front wheel bearing races from the local auto-bodgers, usually free for the asking. It supports the workpiece in the center so you can work all around the edges. That said, I use the 1/8" set for most work on a BP clone, and a short 3" set like Starretts on my small horizontal. They are 1/8 x 5/8, 3/16 x 1/2, and 5/16 x 3/8, in pairs.

Regards,
Bob