Pocket Mechanica / Materials
The substance
A fidget is whatever it’s made of. The same slider in titanium, brass, and Ultem is three different objects — different weight, different sound, different way of aging. This is the matter the hobby is built from.
01
Metals
the bones of almost everythingTitanium~4.4 g/cc
Light for its strength, anodizes to a whole spectrum without dye. The scene’s default — the baseline every other material is judged against.Deep dive →
Zirconium~6.5 g/cc
Heat it and it turns deep oil-slick black and blue. A metal that takes its colour from fire, not pigment.Deep dive →
Stainless steel~7.9 g/cc
Dense, mirror-bright, nearly indestructible. The honest weight in the hand, and the easiest mirror polish in the box.Deep dive →
Brass~8.5 g/cc
Heavy and warm, and it refuses to stay shiny. The patina isn’t a flaw — it’s the entire point.Deep dive →
Copper~8.9 g/cc
Softest of the metals, ages fastest. A living surface that records every thumb that touched it.Deep dive →
Aluminium~2.7 g/cc
The lightest of the metals, anodizes to hard-candy colour. Where budget meets play.
Tungsten~19 g/cc
Almost twice the density of steel. Used where an object needs to feel like it shouldn’t.
02
Composites & patterned
the rare stuff, no two alikeTimascusTi composite
Titanium folded in layers and heat-coloured into a swirling rainbow. No two pieces share a pattern, ever.Deep dive →
ZircutiZr+Ti composite
Timascus’s darker cousin, built on zirconium. Deeper, moodier swirl — less rainbow, more storm.
MokutiTi composite
Titanium worked into organic wood-grain. Quiet, strange, expensive in a way that doesn’t announce itself.Deep dive →
Mokume-ganemixed metal
Layered mixed metals forged into wood-grain — a Japanese technique that predates the hobby by four centuries.
Damascus steelforged steel
Forged, folded, acid-etched into rippling pattern. Function dressed as ornament, borrowed from blade-making.Deep dive →
SuperconductorNb-Ti / Cu
Salvaged MRI cable, etched to reveal a fine grid. Grail-tier — engineered for physics, never meant to be jewellery.
03
Polymers
warm, light, quietPEI · Ultem~1.3 g/cc
Amber, warm to the touch, with a muted click metal can’t make. The connoisseur’s plastic — chosen for sound, not cost.Deep dive →
PEEK~1.3 g/cc
An aerospace polymer, beige and unbothered. Premium engineering plastic where you’d least expect it.Deep dive →
POM · Delrin~1.4 g/cc
Slick and self-quieting. Slides like it’s lubricated because, molecularly, it basically is.
G10fiberglass
Fiberglass in stacked layers, textured and tough. The colour runs all the way through it.
Carbon fiber~1.6 g/cc
Woven, feather-light, rigid. The unmistakably modern look — for better and for worse.
04
Special & accent
not structure — atmosphereZirconia ceramicceramic
Scratch-proof, warm-neutral, oddly soft to the eye. A surface that shrugs off the keys in your pocket.
Sapphirecrystal
Transparent and almost as hard as diamond. Used as a window onto the mechanism underneath.
Tritiumisotope vial
A sealed gas tube that glows on its own for a decade, no charging. Pure atmosphere, zero function.