A professional who tends machine that grooves balls of twine. Responsibilities include:

• Inserts wooden peg through ball of polished twine and places peg with ball into machine.
• Starts machine and holds end of peg while machine presses groove around ball.
• Stops machine and removes ball.
• Unwinds length of twine and ties twine around groove in ball to bind twine.
• Tucks end of twine under binder, using grooved knife.