An apparatus comprises a barrel comprising an interior and an open end. The barrel is configured for engaging a needle along a longitudinal length where the engaged needle extends a distance past the open end. A rod mechanism is disposed within the interior for longitudinal movement and is configured for joining a knife having a blade end where the joined knife is disposed within the interior with the rod mechanism in a retracted position. The blade end extends a distance past the open end with the rod mechanism in an extended position. A spring mechanism engages with the rod mechanism and urges the rod mechanism to be in the retracted position. A plunger device engages with the rod mechanism and applies a force to the rod mechanism to compress the spring mechanism and move the rod mechanism to the extended position.
