Your KB Pen takes seconds to assemble, and even less to switch up. Follow the steps below to load your chosen formula, then swap between brows, eyes, lips or shades whenever the mood takes you.

1. Remove the cartridge cap.
2. Firmly push the cartridge cap into the hardware cap.
3. Screw the cartridge body tightly into the hardware barrel.
4. Close your KB Pen. Listen for the click. Repeat to switch between formulas or shades.