A keyhole saw or a sabre saw will do that.
Sabre saws are good for cutting curves and small holes in wood .
For cutting round holes.
The ribs on the violin is the curves on the side of the violin, by the f holes.
For cutting round holes.
Tenon Saw : Used to cut metal tubes, rods and metal sheets. Hacksaw: Used for cutting straight lines in wood. Crosscut Saw: Used to cut wood purposly at 90 digrees to the wood grain. Coping Saw: Used for cutting a range of woods. Usefull for cutting shapes and curves. Keyhole Saw: Used for cutting small holes in wood.
Boring holes and pouring acid into them.
Nobody else has tried to answer your question, so let me say this: I think you can do it by enlarging the 4 center holes to allow for the slightly different angle. More research would be in order before cutting good parts.
A reamer is a small, pointed tool used for making holes or enlarging existing holes. On a Swiss Army knife, the reamer is typically located on the end of the handle and can be used for tasks such as punching holes in leather, wood, or other materials, as well as for scraping or cleaning small surfaces.
A reamer on a Swiss Army knife is a tool used for making small holes or enlarging existing holes. It typically has a sharp, pointed tip for piercing and a cylindrical shape for smoothing and widening holes. The reamer can be used for tasks such as punching holes in leather, wood, or other materials, as well as cleaning out debris from small openings.
For cutting irregular shapes in wood. One practical and common use is cutting holes for sinks in wood/laminate countertops.
A half round file is a versatile tool used in metalworking, woodworking, and other crafts for shaping and smoothing surfaces. Its flat side is ideal for filing flat areas, while the rounded side is perfect for shaping curves and contours. It can also be used for enlarging holes, refining edges, and deburring materials. Overall, its dual shape makes it useful for a variety of tasks requiring precision and detail.
You use it for cutting small irregular holes in wood