Ti2 Design TechLiner Grid Pen - Inverse Robot Heart, Brass, Acid Washed (TI2-GRID-ROBOTHEART-BRASS-ACIDWASH)

The Grid body in brass, Inverse Robot Heart, acid washed.

Ti2 Design builds the TechLiner out of Honolulu. This is the Grid body in solid brass with the Inverse Robot Heart pattern, acid washed.

Specifications

• Brand: Ti2 Design
• Model: TechLiner Grid
• Pattern: Inverse Robot Heart
• Material: Brass
• Finish: Acid washed
• Refill: Pilot G2 compatible
• Cap: Pull off, magnetically retained at tip and tail, posts

The Cap and the Refill

The cap pulls off and holds magnetically at both ends, so it snaps onto the tail and posts while you write rather than going in a pocket to get lost.

It takes a Pilot G2 refill, which is the spec that matters most on a pen at this price. G2 cartridges are at every drugstore for a couple of dollars, so you are never hunting a proprietary refill or paying a premium for one.

Brass Has Weight

Brass is roughly twice the density of titanium, so the same pen in brass is a different object in your hand. Some people write better with it and some people find it too much, and you generally know which one you are inside a day.

It also patinas. Brass darkens where your fingers go and stays bright where they do not, so after a few months the pen carries a record of how you hold it.

Acid Washed

Acid wash eats into the surface rather than sitting on top of it, leaving a mottled texture that comes out different on every piece. On brass it gives the patina somewhere to start, so the aging happens faster and with more depth.

Inverse Robot Heart

Inverse means the pattern is cut as the negative, so the design sits below the surface and the field around it stands proud. Against acid washed brass the recessed areas hold the darkest patina, which makes the pattern read stronger the longer you carry it.

About Ti2 Design

Ti2 Design works out of Honolulu, Hawaii, and it is the oldest of the companies Mike Bond runs. The TechLiner started life as a Kickstarter.

We met Mike at the California Custom Knife Show in the fall of 2026 and brought these back directly.