Actually, to turn a bead on a bowl I would use a three point tool which only
has one point but three cutting edges. Why is the darned thing not called a
pyramid tool? Whichever the name, it cuts well and is great for this
application.

By the way, to grind a radius into a scraper, mount a drill based grinding
wheel into your drill press, radius the edge with a grinding wheel dresser,
rig a table to stabilize the tool being presented, and grind the radius. Do
not make it complicated.

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God bless and safe turning
Darrell Feltmate
Truro, NS Canada
www.aroundthewoods.com