After a the metal or ceramic injection process (MIM or CIM), the bracket mold retracts in a cooling down phase. TOMY then incorporates an extra step using Computer Numerical Controlled (CNC) milling, to make the archwire slot consistently precise. Milling slot of every EXPERIENCE™ collection to ensure ensures that the slot size is exactly .018” or .022”. All TOMY archwire slots are milled to express the exact torque and angulation built into each bracket thus providing a more predictable result.