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The mechanism

Meet the TrueStop™ Core.

A sphere has no corners to catch the table. So every Orbidice hides a patented mechanism that does their job: it lets the die roll freely, then stops it — fairly — with a single number facing up.

2071431117Precision shellEqual chambersSteel ballYour result

Royal Nox Black: roll, slow, stop.

In three moves

Roll. Settle. Read.

  1. 01

    It rolls like a marble

    A true sphere, smooth and dense in the hand. While it rolls, the polished steel ball inside moves freely.

  2. 02

    The ball finds a chamber

    As the sphere slows, the ball drops into one of the equally sized chambers inside the shell. That is the TrueStop™ Core at work.

  3. 03

    One number faces up

    The weight of the ball holds the sphere still, within about a hand's width, with a single numeral on top. Read it like any die.

Inside an Orbidice: the two resin shells and the steel ball of the TrueStop™ Core
Anatomy

What is inside every sphere.

Two precision shells
Each 25 mm sphere is cast in resin as two halves, then joined around the core. The numerals are engraved and inked by hand on the outside.
A polished steel ball
The heart of the TrueStop™ Core. Free to move while the die rolls; heavy enough to settle it when the roll ends.
Equally sized chambers
Moulded inside the shell, one for each result. Because every chamber is the same size, no result is favoured.
Is it fair?

Same odds as a well-made polyhedral die.

Fairness comes from the chambers, not the outer shape. Every chamber is the same size, so every number has the same chance — checked across thousands of test rolls. The TrueStop™ Core is patented; nobody else makes a complete spherical set that works this way.

TrueStop™ Core
Ordinary dice
What stops the roll
A steel ball settling into a chamber
Edges and corners catching the table
Where it stops
Within about a hand's width
Wherever the corners catch — or off the table
Reading the result
The number facing up
The number facing up
Odds
Equal: equal chambers
Equal: equal faces

TrueStop™, briefly

The patented mechanism inside every Orbidice sphere: a polished steel ball that moves freely while the die rolls, then settles into one of the equally sized chambers moulded in the shell, stopping the die with one number facing up.

Feel it stop in your own hand.

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