Small plane with two handles and a short blade. Originally for wheel spokes (spoke + shave). Now — for any curved surface.
Uses
Buggy wheel spokes. Axe and hammer handles. Cradle bows. Saddle trees. Canoe paddles.
Mastery
A good craftsman makes a spoke in 8 minutes. All 14 wheel spokes in 2 hours. Each identical diameter, no caliper. How? The hand knows. After a thousand spokes, the hand knows better than any measuring tool.