The Pilot FriXion Synergy Knock combines everything you love about FriXion pens with a sleek retractable design and an incredibly smooth writing experience. Simply push the clip to extend or retract the tip, and use the built-in eraser at the top of the pen to erase mistakes quickly and cleanly - no crumbs, smudges, or correction tape needed. This stylish 8-color set features sleek matte grey barrels with colorful slide-knock clips that match each ink color, making it easy to grab the shade you need. Each pen features Pilot's innovative Synergy tip, which blends the precision of a needle point with the strength and durability of a conical tip for crisp, smooth writing. The translucent clip matches the ink color, while the eraser color indicates the pen's tip size, making it easy to identify at a glance. FriXion's special thermo-sensitive ink becomes invisible when rubbed with the built-in eraser. Because the ink reacts to heat, it can also disappear if exposed to high temperatures, so these pens are not recommended for addressing envelopes, signing official documents, or leaving in a hot car. Like magic, erased ink can reappear when exposed to temperatures below 14°F (-10°C). Set of 8 erasable gel pens Ink colors: Pink, Red, Orange, Green, Light Blue, Blue, Blue Black, and Black Innovative Synergy tip for smooth, precise writing 0.3 mm tip size Matte grey barrels with color-matching slide-knock clips Write, erase, and rewrite with Pilot's popular FriXion erasable ink
