This part fits your Edger
Knob-Star 5/16-18
Genuine OEM Part - Manufacturer #720-04072A
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This part fits your Edger
Knob-chute crank
Genuine OEM Part - Manufacturer #720-0201A
This part fits your Edger
Knob shft 2.0x3.75
Genuine OEM Part - Manufacturer #720-0218