By putting the DelGuard's lead advance mechanism into a ZEBRA Sharbo X, you can make the Sharbo X function like a DelGuard (though the rotation will be slightly stiffer). Sharbo X SC5 (paint chipped on the bottom) Gel ink refills: Blue & Green (lead advance mechanism missing) DelGuard 2C Oil-based ballpoint pen: Black & Red + lead advance mechanism The DelGuard lead advance mechanism can be used in non-slim type Sharbo X models (ST3, CL5, SC5, ST5, CB8). Type: Multi-function pen Ink: Gel ink Features: Set Body material: Metal Popular model: Sharbo X Other features: Bundle sale